Standard MTG sets

When Sokka enters, discard up to two cards, then draw that many cards. Whenever you cast an artifact or Lesson spell, put a +1/+1 counter on Sokka.

Whenever you sacrifice another permanent, put a +1/+1 counter on this creature. When this creature dies, you may exile it. When you do, return targ...

Whenever you sacrifice another permanent, put a +1/+1 counter on this creature. When this creature dies, you may exile it. When you do, return targ...

When Iroh enters, create a Food token. At the beginning of combat on your turn, you may have target opponent gain control of target permanent you c...

When Iroh enters, create a Food token. At the beginning of combat on your turn, you may have target opponent gain control of target permanent you c...

Trample When this creature enters, put a +1/+1 counter on each other Ally creature you control. Whenever another Ally you control enters, put a +1/...

Trample When this creature enters, put a +1/+1 counter on each other Ally creature you control. Whenever another Ally you control enters, put a +1/...

Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control. {2}{W}, Discard thi...

Whenever a nonland creature you control dies, earthbend X, where X is that creature's power. (Target land you control becomes a 0/0 creature with h...

Whenever a nonland creature you control dies, earthbend X, where X is that creature's power. (Target land you control becomes a 0/0 creature with h...

Search your library for up to four land cards with different names and reveal them. An opponent chooses two of those cards. Put the chosen cards in...

Search your library for up to four land cards with different names and reveal them. An opponent chooses two of those cards. Put the chosen cards in...

This creature gets +1/+0 for each color among Allies you control. {2}{W}{U}{B}{R}{G}: Earthbend 5. (Target land you control becomes a 0/0 creature ...

Menace Nonbasic lands enter tapped. {7}: Put a conqueror counter on Zhao. As long as Zhao has a conqueror counter on him, nonbasic lands are Mounta...

Menace Nonbasic lands enter tapped. {7}: Put a conqueror counter on Zhao. As long as Zhao has a conqueror counter on him, nonbasic lands are Mounta...

Haste Whenever another Ally you control enters, put a +1/+1 counter on that creature and it gains haste until end of turn.

Haste Whenever another Ally you control enters, put a +1/+1 counter on that creature and it gains haste until end of turn.

First strike Whenever a player casts a noncreature spell, they lose 2 life.

Each creature with mana value X or less loses all abilities until end of turn. Destroy those creatures.

Firebending 1 (Whenever this creature attacks, add {R}. This mana lasts until end of combat.) Tap an untapped Ally you control: Exile target card f...

Firebending 1 (Whenever this creature attacks, add {R}. This mana lasts until end of combat.) Tap an untapped Ally you control: Exile target card f...

Flash Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When Ty Lee enters, tap up to one target creatur...

Flash Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When Ty Lee enters, tap up to one target creatur...

As an additional cost to cast this spell, you may waterbend {6}. (While paying a waterbend cost, you can tap your artifacts and creatures to help. ...