Mirkon, Delver Extraordinaire

Whenever you Venture into a dungeon, choose
one:
•{w}: Target Player gains 5 life
•{1}{u}: Scry 1
•{2}{b}: Target creature gets -1/-1 until end of turn
{bull}{3}{r}: deal 2 damage to any target
{bull}{4}{g}: Destroy target artifact or enchantment