If I follow correctly, that puts us on Ravnica?

Brilliant Tactician
Creature - Human Soldier (U)
Flash
Convoke
Brilliant Tactician gets +1/+1 for each tapped creature you control.
"Our enemies see a collection of weaknesses; I see one great strength."
1/1

wb Rush

Drakewing Splice

Enchantment -- Aura (C)
Enchant creature
Enchanted creature gets +1/+1, has flying, and is a Drake in addition to its other types.
"Unnatural? Flying is natural. You've seen birds before, right?" —Zija, Simic mutationist

Expose the Heart
Instant
Spectacle
Draw a card and Expose the Heart deals 1 damage to you. If the spectacle cost was paid, surveil X, draw X cards, and Expose the Heart deals X damage to you.
"A good artist puts her heart on display and reveals her truths. A great artist puts your heart on display and reveals your truths." - Judith, the Scourge Diva

Thunderblast
Instant (C)
You may exile another red spell you control rather than pay Thunderblast's casting cost.
Thunderblast deals 4 damage to any target.
Vision to see the storm, sense enough to avoid it.

Hydrappendages
Enchantment — Aura
Enchant creature
Enchanted creature gets +1/+1 and is a Hydra in addition to its other creature types.
, Sacrifice Hydrappendages: Enchanted creature gains indestructible until end of turn.
When Hydrappendages is put into the graveyard from the battlefield, create two tokens that are copies of it.

Stoutshell Cockroach
Creature - Insect (C)
Exile a creature card from your graveyard: Stoutshell Cockroach gains indestructible until end of turn.
"My father was an exterminator, and his father before him. I learned better."
—Tausch, Sewer Tendant
1/1

Mizzium-Girded Zeppelin
Artifact - Vehicle
Flying
Crew 2
Whenever you jump-start a spell, Mizzium-Girded Zeppelin gets +2/+0 and gains haste until end of turn.
Flying for non-winged Ravnicans is a matter of choosing whether you trust a Simic beast to not swallow or a goblin pilot to have a steady hand more.
2/5

Experimental Biome
Land (R)
Experimental Biome enters the battlefield tapped.
When Experimental Biome enters the battlefield, add .
: Add or .
Where natural processes bring unnatural results.

DOMINARIA

Crowd Pleaser
Creature - Human Bard (U)
: Target creature you control becomes legendary until end of turn.
"He wore clouds as a helmet, so tall the giant was, and his boots were like mountains of rocks avalanching upon us. But did my lord faint? Did he cower before the might of that behemoth? Would he be standing here before you today if he had not vanquished that foul miscreant!?"
1/2

Look Ahead
Instant
Counter target historic spell.
, Discard Look Ahead: Scry 1, then draw a card.
"We can learn from the past, but we cannot bind ourselves to it." - Naru Meha

Compost Recycler

Creature -- Fungus (U)
, Exile a Fungus card from your graveyard: Create two 1/1 green Saproling creature tokens.
2/2

Magma Charm
Instant (C)
Choose one —

• Discard a card, then draw a card.
• Sacrifice a land. Add .
• Magma Charm deals 1 damage to target creature for each land card in your graveyard.

Kamahl's Surrender
Enchantment - Saga
I - Destroy target artifact. If you don't, remove a lore counter from Kamahl's Regret.
II - Put a +1/+1 counter on each creature you control.
III - Put two +1/+1 counters on each creature you control.

Skellum, Dementia Master

Legendary Creature -- Human Minion (M)
When Skellum, Dementia Master enters the battlefield, exile the top five cards of your library.
You may play cards from exile, but not from anywhere else.
3/3

Dementia Master's Censer
Artifact - Equipment
At the beginning of your upkeep, exile a card from your hand at random.
Whenever equipped creature attacks, it becomes a copy of a random creature card exiled with Dementia Master's Censer until end of turn.
, Pay 3 life: Exile target creature card from a graveyard.
Equip - , Pay 3 life

Shivan Volcano
Land (U)
, Pay 1 life: Add to your mana pool. If you control less lands than any other player, Shivan Volcano deals 1 damage to each opponent.
An explosive land, an explosive life.

Welcoming Kinsfolk
Creature — Kithkin Wizard
Sunrise (You may cast this card as either side. When this creature enters the battlefield, transform each creature with sunset.)
: Put a +1/+1 counter on target Kithkin or Wizard you control.
2/2

Imposing Kinsfolk
Creature — Kithkin Wizard
Sunset (You may cast this card as either side. When this creature enters the battlefield, transform each creature with sunrise.)
: Target creature you control becomes a copy of Imposing Kinsfolk until end of turn.
2/2

Wind Courser
Creature - Faerie (R)
Flash
Flying
When Wind Courser enters the battlefield, the next creature card you cast this turn can be cast as though it had flash.
"Quick! Follow me!"
1/1

Fangcrown Boggart
Creature - Goblin Shaman
When you cast this spell or another Goblin or Shaman spell, it gains deathtouch until end of turn.
Haste
1/3