Grongure, Northland Titan

When Grongure, Northland Titan enters the battlefield, put six +1/+1 counters on target land you control, it becomes a blue Elemental Giant creature with vanishing 3.
Whenever Grongure, Northland Titan attacks,
put six +1/+1 counters on up to two lands you control, they become blue Elemental Giant creatures with vanishing 3.