Requires

Feldon of the Third Path must be on the battlefield. Slobad, Iron Goblin must be in the graveyard. Spine of Ish Sah must be on the battlefield. Clock of Omens must be on the battlefield. Grinding Station must be on the battlefield. Feldon does not have summoning sickness. Mana needed:

Steps

1. Activate Feldon by paying and tapping it, creating a token copy of Slobad with haste that is an artifact in addition to its other types.
2. Activate the Slobad token by tapping it and sacrificing Spine of Ish Sah, adding seven that can only be spent to cast artifact spells or to activate abilities of artifacts.
3. Spine of Ish Sah leaves the battlefield, returning itself from your graveyard to your hand.
4. Cast Spine of Ish Sah by paying .
5. Spine of Ish Sah enters the battlefield, triggering itself and Grinding Station.
6. Resolve the Spine of Ish Sah trigger, destroying target permanent.
7. Resolve the Grinding Station trigger, untapping it.
8. Activate Clock of Omens by tapping Grinding Station and Spine of Ish Sah, untapping the Slobad token.
9. Repeat from step 2.

Results