Sydri, Galvanic Genius, Phyrexian Altar, and Salvaging Station

Prerequisites

• Sydri, Galvanic Genius on the battlefield
• Phyrexian Altar on the battlefield
• Salvaging Station on the battlefield
• available

Steps

1. Activate Salvaging Station by tapping it, returning the mana value 1 artifact from your graveyard to the battlefield
2. Activate Sydri's first ability by paying , causing the artifact to become an artifact creature until end of turn
3. Activate Phyrexian Altar by sacrificing the artifact, adding
4. When the artifact dies, Salvaging Station triggers, untapping Salvaging Station
5. Repeat

Results

• Infinite LTB
• Infinite sacrifice triggers
• Infinite death triggers