Tiem Tiet, the Shadow Root

Flying, menace, trample
Lands you control have deathtouch.
Whenever Tiem Tiet, the Shadow Root becomes the target of a spell or ability you don't control or deals combat damage to a player or planeswalker, put four +1/+1 counters on target land you control. It becomes a 2/2 black and green Elemental Horror creature. It's still a land.