Hori Airi

Foggy Swamp Visions

As an additional cost to cast this spell, waterbend {X}. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.)
Exile X target creature cards from graveyards. For each creature card exiled this way, create a token that's a copy of it. At the beginning of your next end step, sacrifice those tokens.

Chakra Meditation

When this enchantment enters, return up to one target instant or sorcery card from your graveyard to your hand.
Whenever you cast an instant or sorcery spell, draw a card. Then discard a card unless there are three or more Lesson cards in your graveyard.

"You miscalculated. I love Zuko more than I fear you."

Mai, Scornful Striker

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

Jennamite, also known as "creeping crystal," grows remarkably fast. It's also a delicious candy.

Creeping Crystal Coating

Flash
Enchant creature
Enchanted creature gets +0/+3 and has "Whenever this creature attacks, create a Food token." (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")