Extravagant Replication + Temporal Manipulation + Ardent Elementalist

Extravagant Replication

Temporal Manipulation

Ardent Elementalist

How it works

1. Cast Temporal Manipulation by paying its mana cost, causing you to take an extra turn after this one.
2. Move to your next turn.
3. At the beginning of your upkeep, Extravagant Replication triggers, creating a token copy of Ardent Elementalist.
4. When the Ardent Elementalist token enters the battlefield, it triggers, returning Temporal Manipulation from your graveyard to your hand.
5. Repeat.