Namor the Sub-Mariner, Phyrexian Altar, Will Kenrith, and Whim of Volrath

Prerequisites

• Namor the Sub-Mariner on the battlefield
• Phyrexian Altar on the battlefield
• Will Kenrith on the battlefield
• Whim of Volrath in hand
• available

Steps

1. Activate Will Kenrith's second loyalty ability by removing two loyalty counters from it, causing you to draw two cards and causing instant, sorcery and planeswalker spells you cast to cost less to cast until your next turn
2. Cast Whim of Volrath by paying due to Will Kenrith
3. Namor triggers, creating a 1/1 Merfolk creature token
4. Resolve Whim of Volrath
5. Activate Phyrexian Altar by sacrificing the Merfolk, adding
6. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite magecraft triggers
• Infinite sacrifice triggers
• Infinite storm count