Plague of Vermin by paying ({6} magic symbol) ({B} magic symbol) . Choose to pay an amount of life and create that many 1/1 Rat creature tokens.
Activate Ingris by paying ({4} magic symbol) , creating a 2/2 Cadet creature token and giving creatures you control haste until end of turn.
Declare all eligible creatures you control as attackers.
Ingris triggers for each attacking creature, dealing that much damage to each opponent.
Notes
It's recommended to execute this combo when the number of creatures you control that can attack plus (your life total - 1) is greater than or equal to the highest life total among your opponents. This'll ensure each opponent dies due to the Ingris triggers. You can also deal combat damage with the creatures if they cannot be blocked.
Results
Near-infinite creature ETB.
Near-infinite creature tokens with haste.
Near-infinite damage.
Metadata
In 5 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).