Color Identity: B

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- One of your opponents controls a creature.
Steps
- Activate Clock of Omens by tapping itself and King Macar, untapping King Macar.
- King Macar triggers, exiling any creature an opponent controls and creating a Gold token.
- Activate Clock of Omens by tapping the Gold token and King Macar, targeting King Macar.
- Holding priority, activate the Gold token by sacrificing it, adding ({1} magic symbol)
. - Activate Karn by paying ({1} magic symbol)
, causing target noncreature permanent an opponent controls to become an artifact creature until end of turn. - Resolve the Clock of Omens ability, untapping King Macar.
- Repeat from step 2.
Results
- Exile all nonland permanents opponents control.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).