Nadir Kraken triggers, causing you to pay to put a +1/+1 counter on it and create two creature tokens.
Activate
Katara by paying at most and tapping the creature tokens.
Holding priority, activate
Ashnod's Altar twice by sacrificing the creature tokens, adding .
Resolve the
Katara ability, causing you to draw a card.
Repeat from step 2.
Notes
The mana cost can be reduced if you tap combo pieces or other applicable permanents while activating
Katara's waterbend ability the first iteration. As the combo will net each iteration, you can forego sacrificing and/or tapping both tokens on some loops.
Results
Infinite card draw.
Infinite draw triggers.
Near-infinite +1/+1 counters on a creature.
Near-infinite creature ETB.
Near-infinite creature LTB.
Near-infinite colorless mana.
Near-infinite creature tokens.
Near-infinite death triggers.
Near-infinite creature sacrifice triggers.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
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.