(Defense reactions can be played from hand or arsenal to defend.)
Decompose - You may banish 2 Earth cards and an action card from your graveyard. If you do, this gets +1{d}.
Instant -- Discard this: Prevent the next 2 damage that would be dealt to you this turn. The first time you prevent damage this way, create a Runechant token.
As an additional cost to play this, banish any number of cards with 6 or more {p} from your hand. At the beginning of the end phase, return them to your hand.
The next time you would be dealt damage this turn, prevent X of that damage, where X is 2 plus the number of cards banished to play this.