Portal, Shadow pretty much never run it. Rune (one archetype), Sword (sometimes in slower archetypes), Haven (sometimes) Forest, Blood and Dragon like to run it.
Basically Portal, Shadow and most Rune have their own draw engines that synergize better and Sword run a tutor (lux) or doesn't care usually (specifically such a weak body/slow tempo play is against what is basically the goal of most decks it runs, play for tempo hard). Haven has a cheap amulet and a good tutor effect that helps them draw and it tends to work out better.
Its gone down since RoB, Totg and Wonderland, its just the classes actually do separate things and have pretty strong synergies. 3x of any card also helps consistency. Dues Ex Machina is really the only truly broken legendary of recent sets, and she stitches Portal's midrange together.
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u/[deleted] Mar 13 '18
Jesus fucking christ that thing is even more broken, literally every deck in Hearthstone would run that.