Centaur Vinecrasher without a -1/-1 counter on it).
Easy Prerequisites
There are at least one land card in all graveyards.
Steps
Activate
Altar of Dementia by sacrificing
Centaur Vinecrasher.
When
Centaur Vinecrasher dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
Resolve the
Altar of Dementia ability.
Repeat.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite death triggers.
Infinite mill.
Infinite creature sacrifice triggers.
Infinite self-mill.
Metadata
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
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1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.