Harbinger of Desolation

Harbinger of Desolations power equals the
number of mountains you control and its
toughness equals the number of swamps you
control.
{t}, sacrifice a creature you control: Search your library for a mountain or a swamp and put it
into your hand.
{b/r}{b/r}{b/r}{b/r}, sacrifice Harbinger of Desolation: It
deals damage equal to its total power and
toughness to target player or planeswalker.