Greldin, the forest tamer

{t}{1} sacrifice a land, Geldin the forest tamer gets
+0 +1
{t}{2} sacrifice a land, Geldin the forest tamer gets
+1 +1
{t}{3} sacrifice a land Geldin the forest tamer gets
+2 +2
{t}{4} sacrifice a up to 10 lands, deal damage equal
to how many lands you sacrificed to any target
"the world will fall, unless you do first!"