Playing against a Raph & Mikey, Troublemakers competitive Brawl Deck. I cast a containment priest in response to the attack trigger of Raph & Mikey, Troublemaker. The trigger found Summon: Bahamut, a saga creature. The saga text says as it enters the battlefield, add a lore counter. However, Containment Priest would exile it, instead of it entering. It still got exiled but it still triggered the first lore ability on Summon: Bahamut allowing them to destroy my Containment Priest. I know they are both replacement effects on the creature entering, but one of them says that it never enters. Is this a bug or do I not quite understand this rule?