Crookclaw Transmuter

Flash (You may cast this spell any time you could cast an instant.)
Flying
When Crookclaw Transmuter enters the battlefield, switch target creature’s power and toughness until end of turn.

Sporesower Thallid

At the beginning of your upkeep, put a spore counter on each Fungus you control.
Remove three spore counters from Sporesower Thallid: Create a 1/1 green Saproling creature token.

Firebolt

Firebolt deals 2 damage to any target.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Terror

Destroy target nonartifact, nonblack creature. It can’t be regenerated.

Surging Flame

Ripple 4 (When you cast this spell, you may reveal the top four cards of your library. You may cast spells with the same name as this spell from among those cards without paying their mana costs. Put the rest on the bottom of your library.)
Surging Flame deals 2 damage to any target.

Cabal Therapy

Choose a nonland card name. Target player reveals their hand and discards all cards with that name.
Flashback—Sacrifice a creature. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Sliver Queen

: Create a 1/1 colorless Sliver creature token.

Last Stand

Target opponent loses 2 life for each Swamp you control. Last Stand deals damage to target creature equal to the number of Mountains you control. Create a 1/1 green Saproling creature token for each Forest you control. You gain 2 life for each Plains you control. Draw a card for each Island you control, then discard that many cards.

Shard Phoenix

Flying (This creature can’t be blocked except by creatures with flying or reach.)
Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.
: Return Shard Phoenix from your graveyard to your hand. Activate this ability only during your upkeep.

Aura Shards

Whenever a creature enters the battlefield under your control, you may destroy target artifact or enchantment.

Chromeshell Crab

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Chromeshell Crab is turned face up, you may exchange control of target creature you control and target creature an opponent controls.

Darksteel Gargoyle

Flying
Indestructible (Damage and effects that say “destroy” don’t destroy this creature.)

Goblin Shrine

Enchant land
As long as enchanted land is a basic Mountain, Goblin creatures get +1/+0.
When Goblin Shrine leaves the battlefield, it deals 1 damage to each Goblin creature.

Terror

Destroy target nonartifact, nonblack creature. It can’t be regenerated.

Mitotic Slime

When Mitotic Slime dies, create two 2/2 green Ooze creature tokens. They have “When this creature dies, create two 1/1 green Ooze creature tokens.”

Hammer of Bogardan

Hammer of Bogardan deals 3 damage to any target.
: Return Hammer of Bogardan from your graveyard to your hand. Activate this ability only during your upkeep.

Lightning Dragon

Flying
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
: Lightning Dragon gets +1/+0 until end of turn.

Damnation

Destroy all creatures. They can’t be regenerated.

Terror

Destroy target nonartifact, nonblack creature. It can’t be regenerated.