Ephemerate + Temporal Manipulation + Mnemonic Wall

Ephemerate

Temporal Manipulation

Mnemonic Wall

How it works

1. Cast Temporal Manipulation by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Ephemerate by paying , blinking Mnemonic Wall and exiling Ephemerate.
3. When Mnemonic Wall enters, it triggers, returning Temporal Manipulation from your graveyard to your hand.
4. Move to your next turn. At the beginning of your upkeep, Ephemerate's rebound ability triggers, causing you to cast it from exile without paying its mana cost.
5. Resolve Ephemerate, blinking Mnemonic Wall.
6. When Mnemonic Wall enters, it triggers, returning Ephemerate from your graveyard to your hand.
7. Repeat.