Gerrard, Weatherlight Hero + Molten Echoes + Altar of Dementia
Gerrard, Weatherlight Hero
Molten Echoes
Altar of Dementia
Requires
Gerrard, Weatherlight Hero must be in hand, or in the command zone.
Molten Echoes must be on the battlefield.
Altar of Dementia must be on the battlefield.
Mana needed: 
plus enough mana to pay for commander tax, if applicable
plus enough mana to pay for commander tax, if applicable
Steps
- Cast Gerrard either from your graveyard or from the command zone by paying and commander tax, if applicable.
- Gerrard enters the battlefield, triggering Molten Echoes, creating a token copy of Gerrard with haste.
- Put the nontoken Gerrard into your graveyard due to the legend rule.
- The nontoken Gerrard dies, triggering its ability.
- Holding priority, activate Altar of Dementia by sacrificing the token Gerrard.
- The token Gerrard dies, exiling itself and returning the nontoken Gerrard from your graveyard to the battlefield.
- Repeat from step 2 an arbitrarily large number of times.
- Resolve all Altar of Dementia abilities, causing any number of players to mill infinite cards.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mill. Infinite sacrifice triggers. Infinite self-mill.
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