Cataclysm of Mortality

Hexproof.
{c}{1}, discard a card: Tap target creature if {w} was
spent to activate this ability. Return target creature to
it's owner's hand if {u} was spent to activate this ability.
Destroy target non-artifact creature if {b} was spent to
activate this ability. Cataclysm deals 3 damage to any
target if {r} was spent to activate this ability. Destroy
target artifact or enchantment if {g} was spent to
activate this ability. Any player may activate
this ability.