If Boggart Mischief is put into a graveyard from the battlefield at the same time as one or more Goblin creatures you control die, its last ability will trigger for each of those Goblin creatures.
When this enchantment enters, you may blight 1. If you do, create two 1/1 black and red Goblin creature tokens. (To blight 1, put a -1/-1 counter on a creature you control.)
Whenever a Goblin creature you control dies, each opponent loses 1 life and you gain 1 life.