The King in Yellow, Hastur

Flying

During your upkeep exile a permanent or sacrifice The King in Yellow, Hastur

{u}{u}{u}{u}{t}: Take control of target permanent.
{b}{b}{b}{b}{t}: Exile target permanent
{r}{r}{r}{r}{x}{t}: Deal {x} damage to target opponent, where {x} is equal to number of permanents target opponent control