Time Sieve | Encroaching Mycosynth | Rionya, Fire Dancer

(and one other card)

At the beginning of your combat phase,
Rionya triggers, creating at least one token copy of
Avenger of Zendikar with haste.
When the
Avenger of Zendikar token enters the battlefield, its first ability triggers, creating at least four 0/1 Plant creature tokens.
Activate
Time Sieve by tapping it, sacrificing the
Avenger of Zendikar token and the Plant tokens, causing you to take an extra turn after this one.
Repeat each turn.