Velada, Enlightened Druid

+1: Put a green 1/1 elf creature token onto the battlefield under you control with "Sacrifice this creature: Add 1 green mana to your mana pool."
-X: Put X +1/+1 counters on each of up to two target creatures you control. You gain X life.
-7: Populate. For each creature token you control, put a copy of that creature onto the battlefield under your control.