Ayara's Oathsworn + Beacon of Tomorrows + Clockspinning

Mana needed: {9}{U}{U}{U} each turn

UB identity

Commander legal

The 3 combo pieces

What must be in place

Ayara's Oathsworn does not have summoning sickness and has exactly three +1/+1 counters on it.
An opponent cannot block Ayara's Oathsworn.

How to execute it

  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 Beacon of Tomorrows and putting it into your hand.
  3. Cast Clockspinning with buyback by paying {3}{U}, removing a +1/+1 counter from Ayara's Oathsworn and returning Clockspinning to your hand.
  4. Cast Beacon of Tomorrows by paying {6}{U}{U}, causing you to take an extra turn after this one, and shuffle Beacon of Tomorrows into your library.
  5. Repeat each turn.

What the combo produces