Megumin, Crimson Demon

Megumin enters the battlefiled with 1 charge counter. At the beggining of your upkeep you may pay {r} and add up to one charge counter to Megumin.
{t}: Remove 5 charge counters from Megumin, destroy all creatures your opponents controls. For each creature destroyed this way you may pay {r}, if you do destroy target land your opponent controls.