Kodama of the East Tree + Welding Jar Combos

Combo 1 with Tameshi, Reality Architect

Steps

1. Activate Welding Jar by sacrificing it, regenerating target artifact.
2. Activate Tameshi by paying {W} and returning any Plains that enters the battlefield untapped to your hand from the battlefield, returning Welding Jar from your graveyard to the battlefield.
3. When Welding Jar enters the battlefield, Kodama of the East Tree triggers, putting a Plains from your hand onto the battlefield.
4. Activate the Plains by tapping it, adding {W}.
5. Repeat.