Dominion Saboteur dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it. Choose to have it enter as a copy of the creature with persist with a +1/+1 counter on it.
Remove a +1/+1 counter and a -1/-1 counter from
Dominion Saboteur as a state-based action.
Repeat.
Results
Infinite colorless mana.
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
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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.