The Walls of Ba Sing Se

When this enchantment enters, create a Clue token. (It's an artifact with "2, Sacrifice this token: Draw a card.") Creatures you control with flying get +1/+1.

Choose one — • Destroy target creature with no counters on it. • Remove up to three counters from target creature.

Deathtouch Whenever you sacrifice another permanent, put a +1/+1 counter on this creature.

(T: Add R.)

Counter target spell. Draw a card, then mill three cards. Untap target land.

Flying, firebending 2 When Ran and Shaw enter, if you cast them and there are three or more Dragon and/or Lesson cards in your graveyard, create a token that's a copy of Ran and Shaw, except it's not legendary. 3R: Dragons you control get +2/+0 until end of turn.

Firebending 3 (Whenever this creature attacks, add RRR. This mana lasts until end of combat.) 3: Exile the top card of your library. You may play that card this turn.

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