Coelus, Eldrazi Cat

X is target opponent's life total
{t}: add {c}{c}{c}{c}{c} to your mana pool
{ut}: untap target permanent
{x}: Target player loses the game; You
lose at the same time (if you and the opponent
are last in the game, roll a die, whoever rolls
higher wins the game)
"Her parents - unknowingly - have won the war"
-Cayden to Caput