Worldweave

Whenever you cast a creature spell, seek a creature card with lesser mana value, then put it onto the battlefield.

Whenever this creature attacks while saddled, seek a land card and put it onto the battlefield tapped.

Saddle 2

Whenever you cast a Spirit or Arcane spell, you may put a land card from your hand onto the battlefield tapped.

Whenever you draw your second card each turn, you may put a land card from your hand onto the battlefield tapped.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

When this creature enters, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.