Chance the Goblin Spammer

{r}{r}{t} Until the beginning of your next
Upkeep, whenever a spell or ability creates
one or more creature tokens, you create a
1/1 Red Goblin creature token.
(This ability does not proc itself.)
Whenever Chance the Goblin Spammer
becomes the target of a spell that would destroy
or exile it, Chance the Goblin Spammer creates
X 1/1 Red Goblin creature tokens, where X
is the converted mana cost of that spell.