Tawnos, Solemn Survivor, Hyrax Tower Scout, and Ashnod's Altar

Prerequisites

• Tawnos, Solemn Survivor on the battlefield
• Hyrax Tower Scout in the graveyard
• Ashnod's Altar on the battlefield
• available

Steps

1. Activate Tawnos's second ability by paying , tapping it and sacrificing two artifact tokens, exiling Hyrax Tower Scout from your graveyard and creating a token copy of it that is an artifact in addition to its other types
2. When the Hyrax Tower Scout token enters, it triggers, untapping Tawnos
3. Activate Tawnos's first ability by paying and tapping it, creating a copy of the Hyrax Tower Scout token and causing you to mill two cards
4. When the Hyrax Tower Scout token enters, it triggers, untapping Tawnos
5. Activate Ashnod's Altar by sacrificing a Hyrax Tower Scout token, adding
6. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-mill