You haven't completed, or are currently venturing in, Tomb of Annihilation.
Mana Needed
available.
Steps
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 .
Repeat.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite +1/+1 counters.
Near-infinite creature ETB.
Near-infinite creature LTB.
Near-infinite Treasure tokens.
Near-infinite colored mana.
Near-infinite creature tokens.
Near-infinite lifegain.
Near-infinite lifegain triggers.
Near-infinite lifeloss.
Near-infinite storm count.
Near-infinite ventures into the dungeon.
Metadata
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.