Plague of Vermin by paying and choosing to pay any amount of life, creating that many 1/1 Rat creature tokens.
Activate
Evereth by sacrificing a Rat.
When the Rat dies,
Nadier's Nightblade triggers, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the
Evereth ability.
Repeat from step 2 as able.
Notes
It's recommended to pay as much life as possible to maximize the amount of lifeloss. If an opponent happens to pay life during casting
Plague of Vermin, those additional Rats can also be sacrificed.
If you have a way to kill
Evereth and available, you can do so after putting a significant amount of +1/+1 counters on it to deal damage to each opponent using its second ability.
Results
Near-infinite +1/+1 counters on a creature.
Near-infinite creature ETB.
Near-infinite creature LTB.
Near-infinite creature sacrifice triggers.
Near-infinite creature tokens for all players.
Near-infinite death triggers.
Near-infinite lifeloss.
Near-infinite damage.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
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.