King Dedede

{x}{t}: this gets +X/+X. {x}{t}: target creature gets (or plainswalker) gets X death counters on it.{7}{t}: for every death counter on a creature (or plainswalker), that there dies. {x}{t}, this fights anoter target (this could be a creature you own): if dedede wins, he gets +X/+X.
{t}: create a gaurd token.