Feldon of the Third Path, Dockside Extortionist, Thornbite Staff, and Altar of Dementia

Prerequisites

• Feldon of the Third Path on the battlefield
• Dockside Extortionist in the graveyard
• Thornbite Staff on the battlefield
• Altar of Dementia on the battlefield
• Thornbite Staff attached to Feldon
• Feldon does not have summoning sickness
• Opponents control at least four artifacts and/or enchantments
• available

Steps

1. Activate Feldon by paying and tapping it, creating a token copy of Dockside Extortionist that is an artifact in addition to its other types
2. When Dockside Extortionist enters the battlefield, it triggers, creating at least four Treasure tokens
3. Activate three Treasures by tapping and sacrificing them, adding
4. Activate Altar of Dementia by sacrificing Dockside Extortionist
5. When Dockside Extortionist dies, Feldon triggers, untapping Feldon
6. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Dockside Extortionist's power
7. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite Treasure tokens