Marneus Calgar, Nadir Kraken, and Ashnod's Altar

Prerequisites

• Marneus Calgar on the battlefield
• Nadir Kraken on the battlefield
• Ashnod's Altar on the battlefield
• You have a way to draw a card
• available

Steps

1. Draw a card
2. Nadir Kraken triggers, causing you to pay to put a +1/+1 counter on it and create a 1/1 Tentacle creature token
3. The Tentacle enters the battlefield, triggering Marneus
4. Holding priority, activate Ashnod's Altar by sacrificing the Tentacle, adding
5. Resolve the Marneus trigger, causing you to draw a card
6. Repeat from step 2

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite +1/+1 counters on Nadir Kraken
• Near-infinite colorless mana
• Near-infinite creature tokens
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers