Chikorita

Level up {g/w}{g/w}: Put a level counter on this.
(Level up only as a sorcery.)
Level 1-3 — [4/4] Lifelink
Level 4+ — [5/7] Lifelink, Vigilance
Synthesis
{g/w}{g/w}{g/w}, {t}: Creatures you control get
+3/+3 until end of turn