Standard MTG sets

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Valiant ...

Haste Whenever a player casts their second spell each turn, Hearthborn Battler deals 2 damage to target opponent.

Whenever you cast a noncreature or Otter spell, you may exile the top card of your library. Until end of turn, you may play that card. This ability...

Menace, reach Frilled Sparkshooter enters with a +1/+1 counter on it if an opponent lost life this turn.

When Flamecache Gecko enters, if an opponent lost life this turn, add {B}{R}. {1}{R}, Discard a card: Draw a card.

During your turn, you may cast instant and sorcery spells from your graveyard by paying 1 life in addition to their other costs. If a card or token...

Haste Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Valiant — Whenever Emberheart Challenger becomes...

Flying Whenever Dragonhawk enters or attacks, exile the top X cards of your library, where X is the number of creatures you control with power 4 or...

Flying Whenever Dragonhawk enters or attacks, exile the top X cards of your library, where X is the number of creatures you control with power 4 or...

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Whenever...

Conduct Electricity deals 6 damage to target creature and 2 damage to up to one target creature token.

This creature gets +1/+1 for each other Rat you control.

This creature gets +1/+1 for each other Rat you control.

Menace Whenever you expend 4, you may discard your hand. If you do, draw two cards. (You expend 4 as you spend your fourth total mana to cast spell...

At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is Brambleguard Captain's power.

Gift a Treasure (You may promise an opponent a gift as you cast this spell. If you do, they create a Treasure token before its other effects. It's ...

(Gain the next level as a sorcery to add its ability.) Whenever you cast a noncreature spell, you may discard a card. If you do, draw a card. {2}{R...

When Alania's Pathmaker enters, exile the top card of your library. Until the end of your next turn, you may play that card.

Choose one — • Agate Assault deals 4 damage to target creature. If that creature would die this turn, exile it instead. • Exile target artifact.

When Wick's Patrol enters, mill three cards. When you do, target creature an opponent controls gets -X/-X until end of turn, where X is the greates...

As long as you've lost life this turn, Essence Channeler has flying and vigilance. Whenever you gain life, put a +1/+1 counter on Essence Channeler...

As long as you've lost life this turn, Essence Channeler has flying and vigilance. Whenever you gain life, put a +1/+1 counter on Essence Channeler...

Landfall — Whenever a land you control enters, this creature deals 1 damage to target opponent. (This token's mana cost is {B}.)

Landfall — Whenever a land you control enters, this creature deals 1 damage to target opponent. (This token's mana cost is {B}.)