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.
It has no place being legal in Modern ever again, and the fact that it was made in a supplemental product, Modern Horizons , makes me wish it didnt exist in the first place
Monsters like Galaxy Wizard and Radius, the Half-Moon Dragon have effects that allow them to increase their levels to Level 8, while spell and trap cards such as Rank-Up-Magic Cipher Ascension or Constellar Belt are designed to bring out even stronger XYZ monsters or protect your Galaxy-Eyes monsters once theyre already on the field
If you've always wanted a copy but had some issue with the art always depicting some manner of anthropomorphic tree, you're in luck
It also has Tap: Add one green. Gnarlwood Dryad Gnarlwood Dryad is a one-cost (one green) creature with Deathtouch
Furthermore, Temple of the False God generates colorless mana, which doesnt help too much