Encroaching Mycosynth + Rapacious One + Time Sieve

UBR identity

Commander legal

The 3 combo pieces

• Encroaching Mycosynth
• Rapacious One
• Time Sieve

What must be in place

Rapacious One does not have summoning sickness.
Rapacious One cannot be blocked by an opponent.

How to execute it

1. Deal combat damage using Rapacious One.
2. Rapacious One triggers, creating five 0/1 Eldrazi Spawn creature tokens.
3. Activate Time Sieve by tapping it and sacrificing the Eldrazi Spawns, causing you to take an extra turn after this one.
4. Repeat each turn.

What the combo produces

• Infinite turns
• Lock