Ayara's Oathsworn + Nexus of Fate + Clockspinning

Ayara's Oathsworn

Nexus of Fate

Clockspinning

How it works

1. Deal combat damage to an opponent using Ayara's Oathsworn.
2. Ayara's Oathsworn triggers, putting a +1/+1 counter on it and searching your library for Nexus of Fate and putting it into your hand.
3. Cast Clockspinning with buyback by paying 3, removing a +1/+1 counter from Ayara's Oathsworn and returning Clockspinning to your hand.
4. Cast Nexus of Fate by paying 5, causing you to take an extra turn after this one, and shuffle Nexus of Fate into your library.
5. Repeat each turn.