Yosei, the Morning Star, Nim Deathmantle, and Ashnod's Altar

Prerequisites

• Yosei, the Morning Star on the battlefield
• Nim Deathmantle on the battlefield
• Ashnod's Altar on the battlefield
• for each opponent you have available

Steps

1. Activate Ashnod's Altar by sacrificing Yosei, adding
2. When Yosei dies, Nim Deathmantle triggers, causing you to pay to return Yosei from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. When Yosei enters the battlefield, it triggers, causing target opponent to skip their next untap step, and tapping five permanents that opponent controls
4. Repeat for each remaining opponent, and during each of your turns

Results

• Opponents skip their untap steps