In Lorcana, you compete as an illumineer, creating spells using cards featuring iconic Disney characters and iconography in a race to beat your opponent and collect 20 lore points
Printed in 1993s Alpha set, this card was a beast in its time, offering aggressive white decks, an efficient and hard-hitting creature right from turn one
What's done is done, just know that putting Mana Crypt in your casual coin-flip deck meaningfully raises the power level of your deck.
"Well you still have to pay the mana cost, and it's instant spells only, how bad can it be?" It means you can draw lots of cards with Brainstorm, blink Chun-Li to get her out of harm's way with an Ephemerate, or make your board untouchable with a Teferi's Protection every turn
A few board wipes become very one-sided like Expel the Interlopers and The Battle of Bywater