Insidious Bookworms
{B}
Creature — Worm
Oracle Text
When this creature dies, you may pay {1}{B}. If you do, target player discards a card at random.
Watch Out
Exile prevents dies triggersRules Note
'Dies' means 'put into a graveyard from the battlefield.' If a creature is exiled instead of dying (Swords to Plowshares, Rest in Peace), dies triggers won't fire. Tokens do trigger 'dies' abilities briefly before ceasing to exist.