Splinter Twin + Possessed Skaab + Temporal Manipulation

Splinter Twin

Possessed Skaab

Temporal Manipulation

How it works

1. Cast Temporal Manipulation getting an extra turn after this one.
2. Pass the turn.
3. Activate Possessed Skaab, by tapping it, creating a token copy of it with haste.
4. The token copy of Possessed Skaab enters the battlefield, returning Temporal Manipulation from your graveyard to your hand.
5. Repeat.