Sunforger + Officious Interrogation + Mistveil Plains + Time Sieve

Prerequisites

• You control at least two white permanents.
• Sunforger attached to any creature you control.

Steps

1. 1Activate Sunforger by paying and unattaching it, searching your library for Officious Interrogation and casting it without paying its mana cost, plus an additional as necessary.
2. 2Resolve Officious Interrogation, creating at least five Clue artifact tokens.
3. 3Activate Time Sieve by tapping it and sacrificing five Clues, causing you to take an extra turn after this one.
4. 4Activate Mistveil Plains by paying and tapping it, putting Officious Interrogation from your graveyard onto the bottom of your library.
5. 5Activate Sunforger's equip ability by paying , attaching it to any creature you control.
6. 6Repeat each turn.

Effects

• Infinite turns
• Lock