Uritog, Depths Hunger

Trample
At the beginning of each upkeep, you may
sacrifice a land. If you do, untap Uritog, Depths
Hunger.
Whenever you sacrifice a land, if it was an island,
draw a card, if it was a swamp, target player mills
five cards, if it was a forest, put a +1/+1
counter on Uritog, Depths Hunger.