Life Titan, Elf Champion

Lifelink
Elves you control get +3/+3 and {t}: you gain 5 life
{g}: Create a 1/1 elf with {t}: you gain 5 life
at the beginning of your upkeep, put X +1/+1 counters on Life Titan, Elf Champion. X is the # of Elves you control plus your devotion to green