Maeralya, Elven War Queen

+2: create X 2/2 Red and Green Elf Warrior tokens with trample, and create X 2/2 Green and White Elf Soldier tokens with vigilance.
-3: Put X +1/+1 counters on all creatures you control.
-12: create an emblem with "Whenever a creature dies or enters the battlefield put X +1/+1 counters o all creatures you control, where X is your life"