Bladewing's Thrall, Cloudstone Curio, Mothdust Changeling, and Phyrexian Altar

Prerequisites

• Bladewing's Thrall in the graveyard
• Cloudstone Curio on the battlefield
• Mothdust Changeling in hand
• Phyrexian Altar on the battlefield
• available

Steps

1. Cast Mothdust Changeling by paying
2. When Mothdust Changeling enters the battlefield, Cloudstone Curio and Bladewing's Thrall trigger
3. Resolve the Cloudstone Curio trigger, choosing to return nothing to your hand
4. Resolve the Bladewing's Thrall trigger, returning it from your graveyard to the battlefield
5. When Bladewing's Thrall enters the battlefield, Cloudstone Curio triggers, returning Mothdust Changeling from the battlefield to your hand
6. Activate Phyrexian Altar by sacrificing Bladewing's Thrall, adding
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count