Tawnos, Solemn Survivor, Retreat to Coralhelm, Forsaken Monument, and Darksteel Citadel

Prerequisites

• Tawnos, Solemn Survivor on the battlefield
• Retreat to Coralhelm on the battlefield
• Forsaken Monument on the battlefield
• Darksteel Citadel in the graveyard
• Tawnos does not have summoning sickness
• You control at least two artifact tokens
• available

Steps

1. Activate Tawnos' second ability by paying , tapping it, sacrificing two artifact tokens and exiling Darksteel Citadel from your graveyard, causing you to create a token of Darksteel Citadel
2. When the Darksteel Citadel token enters the battlefield, Retreat to Coralhelm triggers, untapping Tawnos
3. Activate the Darksteel Citadel token by tapping it, adding
4. Forsaken Monument triggers, adding
5. Activate Tawnos' first ability by paying and tapping it, creating a copy of the Darksteel Citadel token and causing you to mill two cards
6. Repeat from step 2

Results

• Infinite landfall triggers
• Infinite self-mill
• Infinite tapped Darksteel Citadel tokens