Persist Creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it and at least one +1/+1 counter on it due to
Bioengineered Future.
Remove a -1/-1 counter and a +1/+1 counter from that creature as a state-based action.
Resolve the
Goblin Bombardment ability.
Repeat.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite damage.
Infinite death triggers.
Infinite creature sacrifice triggers.
Metadata
In 124 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).