Master of Arrests
Creature - Human Soldier (U)
When this creature enters, if you control an Island and no Mountain, detain target creature.
This creature has haste and battle cry as long as you control a Mountain and no Island.
3/3

Master of Experimentation
Creature — Vedalken Wizard
When this creature enters, reveal the top card on your library. If you control a Mountain and no Forest and the card is a noncreature, nonland card, you may cast it without paying its mana cost. If you control a Forest and no Mountain and the card is a land or creature card, you may put it on the battlefield. If you didn't cast a spell this way, draw a card.
1/4

Master of Renewal
Creature - Human Cleric (U)
At the beginning of your end step, if a creature you control died this turn, choose one —
• Create a 1/1 white Spirit creature token with flying if you control a Plains and no Forest
• Put a +1/+1 counter on target creature you control if you control a Forest and no Plains.
2/4

Master of Ceremonies
Creature — Goblin Shaman
When this creature enters, if you control a Swamp and no Forest, return target creature card from your graveyard to the battlefield. It gains haste until end of turn. At the beginning of your next end step, sacrifice it.
When this creature enters, if you control a Forest and no Swamp, put a creature card from your hand onto the battlefield. It gains haste until end of turn. At the beginning of your next end step, sacrifice it.
4/1

Niv-Mizzet, Master
Legendary Creature - Dragon Avatar (M)
Flying
When this creature enters, if you control a land of each basic land type, you may put any number of creature cards from your hand onto the battlefield.
When this creature enters, if you don't control a land with a basic land type, destroy all other creatures.
6/6

Skipped green.

Oops, I could've sworn there was a green card there when I started designing.

Master of Growth
Creature (U)
When this creature enters, create two 1/1 green Saproling creature tokens. If you control a Plains and no Swamp, put a +1/+1 counter on each creature token you control. If you control a Swamp and no Plains, you may sacrifice up to two creatures, then draw a card for each creature sacrificed this way.
2/2

Next is colorless because I went out of order.

Guildmaster Signet
Artifact
As this artifact enters, choose two colors.
: Add one mana of one of the chosen colors. Spend this mana only to cast spells of the other chosen color or to activate abilities of permanents or cards of the other chosen color.

New Development
Land
When this land enters, look at the top six cards on your library. You may reveal an Aura card with enchant land from among those cards and put it onto the battlefield attached to this land. Put the rest of the cards on the bottom of your library in random order.
: Add .

Next is Dominaria

Icatian Bannerman

Creature - Human Flagbearer
Banding
While an opponent is choosing targets as part of casting a spell they control or activating an ability they control, that player must choose at least one Flagbearer on the battlefield if able.
When Icatian Bannerman dies, put a banding counter on each creature you control.
1/3

March of the Homarids
Enchantment — Saga
I - Create a 2/2 blue Homarid creature token.
II - Homarids you control get -1/-1 until your next turn.
III - Each player mills two cards.
IV - Homarids you control get +1/+1 until end of turn.
V - Exile this Saga then return it to the battlefield.

Caligo Facecutter
Creature - Human Warlock (R)
Multikicker
Menace
When this creature enters, creatures your opponents control get -1/-1 until end of turn for each time this creature was kicked.
Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature.
2/2

Argothian Reclaimer
Creature - Elf Druid
When this creature enters, create a tapped Powerstone token.
Powerstones you control have ": Add two mana of any combination of colors."
"You do not own the power you pull from the earth any more than a river owns the water that flows through it. The stone, your hand, the earth, the life you waste, it is all Gaea's."
2/4

Wait, I skipped red.

The Challenge of Kamahl
Enchantment — Saga Aura
Enchant creature
I, II - Put a +1/+1 counter on enchanted creature. Its controller chooses another creature they control. It fights enchanted creature.
III - You gain control of enchanted creature until end of turn. It gains haste, trample, and first strike until end of turn.

Skellum, Dementia Instructor
Legendary Creature — Human Minion
Whenever you cast a spell from your graveyard or by paying its madness cost, draw two cards and reveal them. They remain revealed as long as Skellum remains on the battlefield. Those cards can't be played as long as they remain revealed.
Other Minions, Nightmares, Clerics, and Warlocks you control have menace.
1/3

Dingus Gate
Artifact
Whenever a planeswalker is put into a graveyard from the battlefield, ~ deals 2 damage to that planeswalker's controller and each planeswalker they control.
With countless omenpaths sprawling across the multiverse, Dominaria took precautions to alternate methods of interplanar travel.

Citadel of Chatzuk
Land
: Add
At the beginning of combat, up to one target creature you control gains Banding until end of turn.

Lorwyn Shadowmoor

Safe-Harbor Aquitect
Creature — Merfolk Wizard
Dawn (As this enters, transform all permanents you control with dusk.)
Sacrifice this creature: Target other creature gains indestructible and lifelink until end of turn.
1/2

Muck-Dragger Aquitect
Creature — Merfolk Wizard
Dusk (As this enters, transform all permanents you control with dusk.)
Sacrifice another creature: This creature gains indestructible and lifelink until end of turn.
2/1

Skylighter
Creature — Elemental (C)
Dawn (As this enters, transform all permanents you control with dusk.)
Flying
Whenever this creature enters or transforms into Skylighter, another target creature you control gains flying until end of turn.
2/2
//TDFC//
Nightpiercer
Creature — Elemental (C)
Dusk (As this enters, transform all permanents you control with dusk.)
This creature has first strike while attacking.
Whenever this creature enters or transforms into Nightpiercer, another target creature you control gains first strike until end of turn.
3/1

Reaper of Ugliness
Creature - Elf Assassin
Dawn (When this enters, transform all permanents you control with dusk.)
Whenever this creature attacks or blocks, it gains deathtouch until end of turn.
1/3

Sower of Beauty
Creature - Elf Druid
Dusk (When this enters, transform all permanents you control with dawn.)
Whenever this creature attacks or blocks, target other creature you control gains indestructible until end of turn.
3/1