I have run Devastation myself in a few different decks from Commander to 60-card casual and a lot more - I have a number of builds, and one Cube, that feature it right now
Slicer, Hired Muscle / Slicer, High-Speed Antagonist Dreaded casual Commander night ruiner Slicer, Hired Muscle is a tough sell for anything below Bracket 4
If your curve hits its peak near the spells with a mana value of 1-3 (which means you have a lot of spells of that mana value), your deck plays a lot of small and fast cards to overwhelm your opponent in the early game
Mime a chance in a Mewtwo ex deck, where it can deal damage while stalling for Mewtwo ex and Gardevoir
If your opponent tries to remove him, hell rest one of their characters, forcing them to try again
Serialized Guild-leaders One of Ravnicas best-known elements is its guild leaders, influential figures who command the societal pillars of the plane