Ashnod's Altar + Eternal Witness + Kenrith, the Returned King + Time Warp

Mana needed: {5}{U}{U}{B} each turn

WUBRG identity

Commander legal

The 4 combo pieces

• Ashnod's Altar
• Eternal Witness
• Kenrith, the Returned King
• Time Warp

How to execute it

1. Activate Ashnod's Altar by sacrificing Eternal Witness, adding {C}{C}.
2. Activate Kenrith's last ability by paying {4}{B}, returning Eternal Witness from your graveyard to the battlefield.
3. Eternal Witness enters the battlefield, returning Time Warp from your graveyard to your hand.
4. Cast Time Warp by paying {3}{U}{U}, causing you to take an extra turn after this one.
5. Repeat.

What the combo produces

• Infinite turns
• Lock