Sigurd, Jarl of Ravensthorpe + Time Sieve + There and Back Again + City of Death

Prerequisites

• There and Back Again has exactly two lore counters on it.
• City of Death has between one and four lore counters on it.
• An opponent cannot block and kill Sigurd.

Steps

1. 1At the beginning of your precombat main phase, There and Back Again and City of Death trigger.
2. 2Resolve the There and Back Again trigger, putting a lore counter on it.
3. 3There and Back Again's third chapter ability and Sigurd trigger.
4. 4Resolve the Sigurd trigger, putting a +1/+1 counter on a creature you control.
5. 5Resolve the There and Back Again trigger, creating a legendary 6/6 Smaug creature token and causing you to sacrifice There and Back Again.
6. 6Resolve the City of Death trigger, putting a lore counter on it.
7. 7City of Death's second chapter ability and Sigurd trigger.
8. 8Resolve the Sigurd trigger, putting a +1/+1 counter on a creature you control.
9. 9Resolve the City of Death trigger, creating a copy of the Smaug token.
10. 10Put a Smaug token into your graveyard due to the legend rule.
11. 11When the Smaug token dies, it triggers, creating fourteen Treasure tokens.
12. 12Declare Sigurd as an attacker.
13. 13Activate a Treasure by tapping and sacrificing it, adding .
14. 14Activate Sigurd by paying , removing a lore counter from City of Death.
15. 15Activate Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one.
16. 16Move to your next turn.
17. 17At the beginning of your precombat main phase, City of Death triggers, putting a lore counter on it.
18. 18Repeat from step 7.

Effects

• Infinite turns
• Lock