Lord Garavito

Hell Rising —{b}{r}{t}:Search your library for a
Demon with less power than the weakest creature
on your battlefield. You may cast it for free or
add it to your hand. If a Demon was summoned this way that Demon gets a +1/+1 counter and all players take damage equal to its power.
{b}{5}: Exile Lord Garavito and deal damage to target opponent equal to the amount on Demons
in your graveyard.