There is at least one creature on the battlefield.
Steps
Cast
Ovinomancer by paying .
Ovinomancer enters the battlefield, triggering its first ability.
Holding priority, activate
Ovinomancer's second ability by tapping it and returning it from the battlefield to your hand, destroying target creature and causing its controller to create a 0/1 Sheep creature token.
Resolve the
Ovinomancer trigger from step 2, choosing not to return any lands to your hand.
Repeat.
You may also repeat this loop whenever a creature enters the battlefield under an opponent's control.
Results
Destroy all creatures opponents control.
Destroy each creature that enters the battlefield under an opponent's control.
Infinite death triggers.
Infinite creature ETB.
Infinite creature LTB.
Infinite storm count.
Metadata
Lock
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.