Time Sieve + Exsanguinator Cavalry

Prerequisites

• You control at least five Knights that do not have summoning sickness and that cannot be blocked by an opponent.

Steps

1. 1Deal combat damage using at least five Knights.
2. 2Exsanguinator Cavalry triggers, putting a +1/+1 counter on each attacking Knight and creating that many Blood artifact tokens.
3. 3Activate Time Sieve by tapping it and sacrificing five Bloods, causing you to take an extra turn after this one.
4. 4Repeat.

Effects

• Infinite turns
• Lock