Slobad, Iron Goblin + Spine of Ish Sah + Clock of Omens + Encroaching Mycosynth + Grinding Station

Slobad, Iron Goblin

Spine of Ish Sah

Clock of Omens

Encroaching Mycosynth

Grinding Station

How it works

1. Activate Slobad by tapping it and sacrificing Spine of Ish Sah, adding 7 that can only be spent to cast artifact spells or to activate abilities of artifacts.
2. Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
3. Cast Spine of Ish Sah by paying 7.
4. Spine of Ish Sah enters the battlefield, triggering itself and Grinding Station.
5. Resolve the Spine of Ish Sah trigger, destroying target permanent.
6. Resolve the Grinding Station trigger, untapping it.
7. Activate Clock of Omens by tapping Grinding Station and Spine of Ish Sah, untapping Slobad.
8. Repeat.