Elven Perfection

Elf Convoke (Your Elf creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Unatp all Elf creatures you control and put a +1/+1 counter on each of them. They gain Indestructible until end of turn. You gain 2 life and draw a card for each Elf creature you control.