Carcharodon, The Pirate King

Islandwalk, Swampwalk, First strike
{1}{u}: Roll a six sided die, and counter target spell if the result was 4 or higher
{1}{b}: Roll a six sided die, and destroy target creature if the result was 4 or higher.
{u}{b}{x}{t}: Gain control of target non-land permanent, with converted mana cost is equal to {x}.