Mikaeus, the Unhallowed, Resourceful Defense, Dockside Extortionist, and Phyrexian Altar

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Resourceful Defense on the battlefield
• Dockside Extortionist on the battlefield
• Phyrexian Altar on the battlefield
• Opponents control at least four artifacts and/or enchantments
• Dockside Extortionist does not have a +1/+1 counter on it

Steps

1. Activate Phyrexian Altar by sacrificing Dockside Extortionist, adding
2. When Dockside Extortionist dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
3. When Dockside Extortionist enters the battlefield, it triggers, creating at least four Treasure artifact tokens
4. Activate four Treasures by tapping and sacrificing them, adding
5. Activate Resourceful Defense by paying , moving all +1/+1 counters from Dockside Extortionist onto another permanent you control
6. Repeat
7. If opponents control five or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana

Results

• Infinite +1/+1 counters
• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite Treasure tokens