Horde of Notions, Jegantha, the Wellspring, Lightning Greaves, and Altar of Dementia

Prerequisites

• Horde of Notions on the battlefield
• Jegantha, the Wellspring on the battlefield
• Lightning Greaves on the battlefield
• Altar of Dementia on the battlefield
• Lightning Greaves is attached to Jegantha

Steps

1. Activate Jegantha by tapping it, adding
2. Activate Altar of Dementia by sacrificing Jegantha, causing target player to mill five cards
3. Activate Horde of Notions by paying , casting Jegantha from your graveyard without paying its mana cost
4. Activate Lightning Greaves' equip ability by paying , attaching it to Jegantha
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count