Extravagant Replication + Eternal Witness + Notorious Throng

Extravagant Replication

Eternal Witness

Notorious Throng

How it works

1. Deal combat damage to an opponent using a Rogue
2. Cast Notorious Throng for its prowl cost by paying 5, causing you to take an extra turn after this one.
3. Move to your next turn.
4. At the beginning of your upkeep, Extravagant Replication triggers, creating a token copy of Eternal Witness.
5. When the Eternal Witness token enters the battlefield, it triggers, returning Notorious Throng from your graveyard to your hand.
6. Repeat.