Cetrion, Earthen Mother

Cetrion's power and toughness are equal to the number of lands you control.
Pay 3x any mana color. {w} =Heal target creature for 3 toughness after it has received damage of any kind. {g} = Deal damage equal to half the lands you control to opponent. {u}= Tap creature, it does not untap during its controllers next untap step. {r}= Deal 2 damage to any target and 2 subsequent damage at the beggining of opponents upkeep for the next 2 turns. {b} =Opponents must pay (2) per attacking creature they control