Mana Crypt is a two mana boost on the spot, a fine addition to any combination deck, but its drawback is very real
That being said, building an MTG Commander deck isnt easy
One of my new favourite red value cards, Direfleet Daredevil, makes an appearance in this build too
The other upside of Inscription of Ruin is that it's also a fine (if slightly overcosted) removal spell against aggro, where killing any creature with mana value three or less hits basically everything against a deck like Mono-Red or Mono-White
This archetype relies heavily on enchantments, and has a lot in common with the much less friendly 'stax' strategies
Even though it costs seven mana, youll never have to worry about losing your late game play since Tyrranax Rex cannot be countered, letting you cast it without worrying about being blown out on your game-winning play