The Challenger's Plane

{t}, Add {u}{u}, {r}{r}, {r}{u}, {r}{2} or {u}{2} mana to your mana pool.
{x} (X represents power mana, not a selected mana cost) choose: Deal 1 damage to each opponent and their creatures or give target creature +2/+0 and first strike until end of turn.
"Only the strongest may even dare challenge the Challenger's Plane for even a mere second!" Dracon, Guardian of Worlds.