Kallistara, Forest Pillager

Trample, Menace
You have no maximum hand size as long as Kallistara, Forest Pillager is on the battlefield
You can use opponents' lands
{t}, {x}{r} Put X +1/+1 counter on target creature you control, where X is the number of lands tapped to use this ability.
Roll a d8, then draw X cards where X is the result of the roll.