Saundra, Realm Fabricator

+2: Create a 1/2 green artifact creature token named "Crystal Elf" with "Sacrifice this creature, add two colorless mana to your mana pool.
-3: Exile target creature you control then return it to the battlefield under its owner's control with 2 +1/+1 counters on it.
-12: For each non-planeswalker permanent you control, place a copy onto the battlefield except its an artifact in addition to its other type.