Activate Olivia's first ability by paying , dealing 1 damage to a creature an opponent controls, destroying it due to Olivia's deathtouch, and putting a +1/+1 counter on Olivia.
When the creature dies,
Revel in Riches' first ability triggers twice, creating two Treasure artifact tokens.
Activate the Treasures by tapping and sacrificing them, adding .
Repeat from step 2.
If you have a way to give Olivia deathtouch indefinitely, you may 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.
Metadata
Lock
Locks your opponents out of taking some actions.
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
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1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.