Photosynthetic Seedling

Lifelink.
Loot (Whenever this creature deals damage to an opponent, add one mana of any colour to your mana
pool. If this mana empties from your mana pool, put a
+1/+1 counter on this creature.)
Whenever you cast your second spell each turn,
put a +1/+1 counter on Growing Seedling.
Whenever it deals combat damage to an
opponent, proliferate.