Requires

Garth One-Eye must be on the battlefield. Thassa, Deep-Dwelling must be on the battlefield. Temporal Manipulation must be in hand. You have not cast a copy of Regrowth using Garth's ability. Garth does not have summoning sickness. Mana needed: each turn

Steps

1. Cast Temporal Manipulation by paying , causing you to take an extra turn after this one.
2. Activate Garth by tapping it, causing you to pay to cast a copy of Regrowth.
3. Resolve Regrowth, returning Temporal Manipulation from your graveyard to your hand.
4. At the beginning of your end step, Thassa triggers, blinking Garth.
5. Repeat each turn.

Results