Encroaching Mycosynth + Phylath, World Sculptor + Rionya, Fire Dancer + Time Sieve

UBRG identity

Commander legal

The 4 combo pieces

• Encroaching Mycosynth
• Phylath, World Sculptor
• Rionya, Fire Dancer
• Time Sieve

What must be in place

You control at least five basic lands.

How to execute it

1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Phylath with haste.
2. Put the Phylath token into your graveyard due to the legend rule.
3. The Phylath token enters-the-battlefield ability triggers, creating at least five 0/1 Plant creature tokens.
4. Activate Time Sieve by tapping it and sacrificing the Plant tokens, causing you to take an extra turn after this one.
5. Repeat each turn.

What the combo produces

• Infinite turns
• Lock