Cast Acererak the Archlich by paying its mana cost.
Dancing from Dark to Dawn's first ability triggers, putting three +1/+1 counters on Crystalline Crawler.
Resolve the Acererak the Archlich spell. When it enters, it triggers, returning itself from the battlefield to your hand and causing you to venture into any dungeon except Tomb of Annihilation.
Activate Crystalline Crawler three times by removing three +1/+1 counters from it, adding 2.