You have at least four card types in your graveyard.
You control another nonland creature.
Steps
Activate
Reaper of Flight Moonsilver by sacrificing another nonland creature you control.
When the creature dies,
Beifong's Bounty Hunters triggers, earthbending a land.
Resolve
Reaper of Flight Moonsilver's ability, giving it +2/+1 until end of turn.
Activate
Reaper of Flight Moonsilver by sacrificing the land.
When the land dies,
Beifong's Bounty Hunters triggers, returning the land from your graveyard to the battlefield tapped.
When the land enters,
Felidar Retreat triggers, either putting a +1/+1 counter on each creature you control and granting them vigilance until end of turn or creating a 2/2 white Cat Beast creature token.
Resolve
Reaper of Flight Moonsilver's ability, giving it +2/+1 until end of turn.
Repeat.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite creature sacrifice triggers.
Infinite death triggers.
Infinite landfall triggers.
Infinitely large creature until end of turn.
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.