Tinder

Crystallize {b}{r}(When you successfully cast this
spell from your hand, exile it and create a Crystal
artifact token with "{b}{r}, Sacrifice this permanent:
You may cast Tinder from exile for {0} until end of
turn.")
Destroy target artifact or enchantment. If you
cast Tinder from exile, you may have target
attacking or blocking creature gets -0/-X until
end of turn, where X is that artifact or
enchantment's converted mana cost.