Both of those one one-cost card is evisveratingy good
Chainer, Nightmare Adept Though Chainer, Nightmare Adept falls into the realm of just casting from the graveyard, I think its ability works well with other reanimate effects
While the artifact has never really been a tournament staple (outside of a very brief few weeks in Standard before Reflector Mage was banned), it's a really fun, durdly, value-centric card that also has the potential to enable weird combos
And with so many similar yet distinct currencies, its easy to get confused
Where the Basic Metal Energy saw demand due to Gholdengo ex, the Basic Darkness Energy receives the same lift from Marnies Grimmsnarl ex, as well as Pecharunt and the Loyal Three, the mascots of the entire set, all of which are Dark-type cards