Mana Crypt is a two mana boost on the spot, a fine addition to any combination deck, but its drawback is very real
2Magic: The Gathering Arenacode cards (1 per deck, only available in select regions)
High Utility, Low Price Doomed Necromancer Magus of the Wheel Chainer, Nightmare Adept Solemn Simulacrum Chaos Warp Beacon of Unrest The Eldest Reborn Warstorm Surge Fair play: at the time of printing, Solemn Simulacrum and Chaos Warp were not below $2, but so it goes
So as long as development tested the Rats in high numbers to make sure it wasn't degenerate, we knew it was safe to break the rule (well, as safe as development can ever be the real world just has so many more playtesters.) Rule #4 Breaking Rules Is A Test For the Future When we do choose to break a rule, R&D tends to keep an eye on the card
Its a nice win condition for Aetherworks Marvel decks that can help dig to find the card as well as cast the first copy, which doesnt need to be cast from hand
It focuses on sifting through your deck to get the cards you need whilst healing or buffing your characters, for example