Dominion Saboteur as a copy of the creature with persist).
Notable Prerequisites
The creature with persist has a +1/+1 counter on it.
Steps
Activate
Bloodthrone Vampire by sacrificing
Dominion Saboteur.
When
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.
Resolve the
Bloodthrone Vampire ability.
Repeat.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinitely large creature until end of turn.
Metadata
In 0 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).