Felidar Guardian, Kaya the Inexorable, Phyrexian Altar, and Pitiless Plunderer

Prerequisites

• Felidar Guardian on the battlefield
• Kaya the Inexorable on the battlefield
• Phyrexian Altar on the battlefield
• Pitiless Plunderer on the battlefield
• Kaya's loyalty abilities have not been used this turn

Steps

1. Activate Kaya's +1 loyalty ability to put a Ghostform Counter on Felidar Guardian
2. Sacrifice Felidar Guardian to Phyrexian Altar for
3. Pitiless Plunderer triggers, creating a Treasure token
4. Tap and sacrifice the treasure token for
5. Felidar Guardian is returned to your hand, and you create a 1/1 Spirit creature token
6. Sacrifice the Spirit for
7. Pitiless Plunderer triggers, creating a Treasure token
8. Tap and sacrifice the treasure token for
9. Cast Felidar Guardian
10. When Felidar Guardian enters the battlefield, exile Kaya and return her to the battlefield
11. Repeat

Results

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