Kenrith, the Returned King, Dockside Extortionist, and Altar of Dementia

Prerequisites

• Kenrith, the Returned King on the battlefield
• Dockside Extortionist in the graveyard
• Altar of Dementia on the battlefield
• Opponents control at least five artifacts and/or enchantments
• available

Steps

1. Activate Kenrith's fifth ability by paying , returning Dockside Extortionist from your graveyard to the battlefield
2. When Dockside Extortionist enters the battlefield, it triggers, creating at least five Treasure tokens
3. Activate Altar of Dementia by sacrificing Dockside Extortionist, causing target player to mill cards equal to Dockside Extortionist's power
4. Activate five Treasures by tapping and sacrificing them, adding
5. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite Treasure tokens
• Infinite self-mill
• Infinite lifegain triggers
• Infinite lifegain
• Infinite +1/+1 counters
• Put all creature cards from all graveyards onto the battlefield under your control
• Infinite card draw for any number of players
• Infinite draw triggers for any number of opponents