Commons:
Spoiler
Break Cover 
Instant (C)
Return target permanent you control to its owner’s hand.
Draw a card.
Decision by Committee
Instant (C)
Counter target spell. If you do, that spell’s controller skips their next draw step.
Exert Influence
Sorcery (C)
Draw two cards, then discard a card.
Guild Councillor
Creature - Human Wizard (C)
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
Whenever Guild Councillor dies search target opponents library for a card and put it into his or her graveyard. That player shuffles their library afterwards.
2/2
Guild Initiate
Creature - Human Rogue (C)
Guild Initiate can't be blocked.
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
1/1
Hamper
Instant (C)
Counter target spell with a converted mana cost of three or less.
Maldrus Official
Creature - Human Rogue (C)
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
: Target creature gains Subvert until end of turn.
3/2
Messenger Crow
Creature - Bird (C)
Flying
When Messenger Crow enters the battlefield, draw a card.
: Shuffle Messenger Crow into it’s owners library. Activate this ability only as a sorcery.
1/2
Mire in Process
Instant (C)
Creatures get -X/-0 until end of turn.
Owl Familiar
Creature - Bird (C)
Flying
You have no maximum hand size.
0/2
Royal Archives
Sorcery (C)
Choose one -
• Shuffle three target cards from target players graveyard into their library.
• Shuffle a card you own from outside the game into your library.
Draw a card.
Seal of Jaden
Enchantment - Aura (C)
Enchant creature
Enchanted creature gains subvert and hexproof.
His seal is better than any key.
Instant (C)
Return target permanent you control to its owner’s hand.
Draw a card.
Decision by Committee
Instant (C)
Counter target spell. If you do, that spell’s controller skips their next draw step.
Exert Influence
Sorcery (C)
Draw two cards, then discard a card.
Guild Councillor
Creature - Human Wizard (C)
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
Whenever Guild Councillor dies search target opponents library for a card and put it into his or her graveyard. That player shuffles their library afterwards.
2/2
Guild Initiate
Creature - Human Rogue (C)
Guild Initiate can't be blocked.
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
1/1
Hamper
Instant (C)
Counter target spell with a converted mana cost of three or less.
Maldrus Official
Creature - Human Rogue (C)
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
: Target creature gains Subvert until end of turn.3/2
Messenger Crow
Creature - Bird (C)
Flying
When Messenger Crow enters the battlefield, draw a card.
: Shuffle Messenger Crow into it’s owners library. Activate this ability only as a sorcery.1/2
Mire in Process
Instant (C)
Creatures get -X/-0 until end of turn.
Owl Familiar
Creature - Bird (C)
Flying
You have no maximum hand size.
0/2
Royal Archives
Sorcery (C)
Choose one -
• Shuffle three target cards from target players graveyard into their library.
• Shuffle a card you own from outside the game into your library.
Draw a card.
Seal of Jaden
Enchantment - Aura (C)
Enchant creature
Enchanted creature gains subvert and hexproof.
His seal is better than any key.
Uncommons:
Spoiler
Call of the Master
Enchantment (U)
Whenever you draw more than one card in a turn create a 2/2 blue human wizard creature token.
Beguiling Wiles
Sorcery (U)
Put target creature on top of its owner’s library.
Resonance (You may cast this from your graveyard as you cast another spell with the same name. If a spell cast this way would be put into a graveyard from anywhere, exile it instead.)
I had this at 3U but it never sat right at uncommon at that cost with me so down it went.
Guardian Gargoyle
Creature - Gargoyle (U)
Flying, defender
Bloodied — When this creature is damaged, if it doesn’t have a bloodied counter, put a bloodied counter on it.
As long as Guardian Gargoyle is bloodied it gets +1/+1 and loses defender.
3/4
Foppish Noble
Creature - Human (U)
Foppish Noble costs less to cast where X is the number of cards put into an opponents graveyard from his or her library this turn.
4/4
Subvert support card.
Leverage
Instant (U)
Search your library for an instant or sorcery with a converted mana cost equal to X, reveal it and put it into your hand. Then shuffle your library.
Is this too weak for an uncommon? I thought about moving it to instant.
Spider Elite
Creature - Human Wizard (U)
Flying
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
4/3
Trained Guardian
Creature - Griffon (U)
Hexproof, flying
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
2/4
Enchantment (U)
Whenever you draw more than one card in a turn create a 2/2 blue human wizard creature token.
Beguiling Wiles
Sorcery (U)
Put target creature on top of its owner’s library.
Resonance (You may cast this from your graveyard as you cast another spell with the same name. If a spell cast this way would be put into a graveyard from anywhere, exile it instead.)
I had this at 3U but it never sat right at uncommon at that cost with me so down it went.
Guardian Gargoyle
Creature - Gargoyle (U)
Flying, defender
Bloodied — When this creature is damaged, if it doesn’t have a bloodied counter, put a bloodied counter on it.
As long as Guardian Gargoyle is bloodied it gets +1/+1 and loses defender.
3/4
Foppish Noble
Creature - Human (U)
Foppish Noble costs
less to cast where X is the number of cards put into an opponents graveyard from his or her library this turn.4/4
Subvert support card.
Leverage
Instant (U)
Search your library for an instant or sorcery with a converted mana cost equal to X, reveal it and put it into your hand. Then shuffle your library.
Is this too weak for an uncommon? I thought about moving it to instant.
Spider Elite
Creature - Human Wizard (U)
Flying
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
4/3
Trained Guardian
Creature - Griffon (U)
Hexproof, flying
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
2/4
Rares:
Spoiler
Accidental Genius
Sorcery (R)
Mill five. If a card named Accidental Genius is put into your graveyard in this way, take an extra turn after this one.
Gale Pixie
Creature - Faerie Wizard (R)
Flash
Flying
When Gale Pixie enters the battlefield, each player returns a land he or she controls to their owners’ hands.
2/1
Designed by Ty.
Ty posted this little beauty in a card thread. I hope he doesn't mind me using it. If you do Ty, let me know and I'll take it down. With Landhome in the set, I needed support cards for it and this one fit perfectly. I might rework the flavor a bit still.
Maldrus Archivist
Creature - Human Wizard (R)
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
: Draw a card.
1/1
Opposite Reaction
Instant (R)
Target creature spell enters the battlefield as a copy of target creature.
Plans within Plans
Enchantment (R)
Discard a card: Return target permanent you control to it’s owners hand.
Definitely some potential for brokeness, but in play testing with just my cards, nothing ridiculous came up so I went for it.
Shroudspeaker
Creature - Human Wizard (R)
: Search your library for a creature card and exile it. If you do, Shroudspeaker becomes a copy of the exiled creature and gains this ability. Then shuffle your library. Any player may activate this ability.
3/3
A medium channeling the spirits of the Shroud.
Tear Reality
Enchantment (R)
Whenever you cast an instant or sorcery you may create an X/X blue elemental creature token where X is that instant or sorceries converted mana cost.
Needs a better name.
Sorcery (R)
Mill five. If a card named Accidental Genius is put into your graveyard in this way, take an extra turn after this one.
Gale Pixie
Creature - Faerie Wizard (R)
Flash
Flying
When Gale Pixie enters the battlefield, each player returns a land he or she controls to their owners’ hands.
2/1
Designed by Ty.
Ty posted this little beauty in a card thread. I hope he doesn't mind me using it. If you do Ty, let me know and I'll take it down. With Landhome in the set, I needed support cards for it and this one fit perfectly. I might rework the flavor a bit still.
Maldrus Archivist
Creature - Human Wizard (R)
Island Dweller (Whenever an Island enters the battlefield under your control you may untap this creature.)
: Draw a card.1/1
Opposite Reaction
Instant (R)
Target creature spell enters the battlefield as a copy of target creature.
Plans within Plans
Enchantment (R)
Discard a card: Return target permanent you control to it’s owners hand.
Definitely some potential for brokeness, but in play testing with just my cards, nothing ridiculous came up so I went for it.
Shroudspeaker
Creature - Human Wizard (R)
: Search your library for a creature card and exile it. If you do, Shroudspeaker becomes a copy of the exiled creature and gains this ability. Then shuffle your library. Any player may activate this ability.3/3
A medium channeling the spirits of the Shroud.
Tear Reality
Enchantment (R)
Whenever you cast an instant or sorcery you may create an X/X blue elemental creature token where X is that instant or sorceries converted mana cost.
Needs a better name.
Mythic:
Spoiler
Grand Chancellor Jaden
Legendary Creature - Human Wizard (M)
Hexproof
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
Your opponents can’t target themselves or permanents they control.
4/7
Grand Chancellor Jaden is the head of the Maldrus Senate. He is a member of the Spider Clan and figurehead for Lord Rufus Talon (see multicolor.) He is completely without mercy and fully embraces the doctrines of the Spider Clan. He has no regard for human life other than his own, which he would gladly give if it meant he could free Malhedra from his prison. He is well known as a ruthless man that should not be crossed unless you want your family to disappear before you do.
Legendary Creature - Human Wizard (M)
Hexproof
Subvert (Whenever this creature deals combat damage to a player, that player mills that many cards.)
Your opponents can’t target themselves or permanents they control.
4/7
Grand Chancellor Jaden is the head of the Maldrus Senate. He is a member of the Spider Clan and figurehead for Lord Rufus Talon (see multicolor.) He is completely without mercy and fully embraces the doctrines of the Spider Clan. He has no regard for human life other than his own, which he would gladly give if it meant he could free Malhedra from his prison. He is well known as a ruthless man that should not be crossed unless you want your family to disappear before you do.