In a way, this land doubles as both a mana accelerant and a way of protecting your game-winning card from hand disruption
The catch is that aside from costing 4 mana, you also need to essentially sacrifice a creature for it to work
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Cat Teferi Combo Produce 1 mana from "Mox Amber" or "Mox Opal", bounce it with "Teferi, Time Raveler" and draw a card, cast the recovered Mox and blink Teferi, and if you repeat the process of bouncing the Mox with Teferi again, you get infinite mana and infinite card draw
Much like with Cavern of Souls, there will be a handful of Cosmium Neon Versions of Mana Crypt
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