Dulcet Sirens + Missy + Phyrexian Altar

UBR identity

Commander legal

The 3 combo pieces

• Dulcet Sirens
• Missy
• Phyrexian Altar

How to execute it

1. Activate Phyrexian Altar by sacrificing Dulcet Sirens, adding {U}.
2. When Dulcet Sirens dies, Missy's first ability triggers, returning Dulcet Sirens from your graveyard to the battlefield face down as a 2/2 Cyberman artifact creature.
3. Activate Dulcet Sirens's morph ability by paying {U}, turning it face up.
4. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers