An opponent has a creature card in their graveyard.
Steps
Activate
Evereth by sacrificing
Puppeteer Clique.
When
Puppeteer Clique dies, its persist ability and
Szarel trigger.
Resolve the persist trigger, returning
Puppeteer Clique from your graveyard to the battlefield with a -1/-1 counter on it.
When
Puppeteer Clique enters, it triggers, putting a creature card from an opponent's graveyard onto the battlefield under your control.
Resolve the
Szarel trigger, putting a number of +1/+1 counters on another creature you control.
Resolve the
Evereth ability from step 1.
Activate
Evereth by sacrificing the creature returned in step 4.
When the creature dies,
Szarel triggers, putting a number of +1/+1 counters on
Puppeteer Clique.
Resolve the
Evereth ability.
Repeat.
Notes
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
Infinite +1/+1 counters on creatures you control.
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinite damage.
Metadata
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.