While Valki may be based on Loki, the trickster God, hes everyones favorite infamous planeswalker Tibalt in disguise
Features: Expansion Pack
But even there I was always skeptical, since has a shortage of allies who can quest effectively and if you're putting all the questing load on your heroes you're left completely depending on your allies for combat, despite the fact your heroes are probably good at it (And doesn't have the generic readying to let your heroes do both)
These are all universally playable in a bunch of different decks
When a creature with hideaway N enters the battlefield, look at the top N cards of your library, exile one of them face down, then put the rest on the bottom of your library. The sets update to hideaway allows N to be any number, changed from being inherently four previously
Four mana to produce a Zombie for each card discarded is more than serviceable, and eventually you can service your vehicle with a 2/2 Zombie crew member to block with a 5/5 for days or go in swinging if thats whats required