This and Bottle of Sand fill rather similar holes. I think this belongs in Set 2, which won't have the color-fixing Deserts at uncommon like Set 1, and which will probably need more color-fixing since it will having Hydrate and probably Hybrid.

There have been a number of cards strictly better than Manalith over the years, including ones that (at the time) could hurt the opponent (Spectral Searchlight) or fix your mana beyond one-per-turn (Coalition Relic, Chromatic Lantern). (Amusingly - in retrospect if not at the time - there have also been plenty of cards strictly worse than Manalith too.)

However, I think this is way better than all of them. Cantripping is such a huge benefit on a manafixer. I'll note that Mana Cylix was pretty awful but Prophetic Prism, the same with a cantrip and added to the cost, is fine. Also note that Prismatic Lens is the same but with tapping for replacing the cantrip.

So I suspect this would be entirely fair at either:

­, cantrip, tap to add one of any colour

­, cantrip, tap to add

Huh. I didn't realize it was that much better than Manalith, especially considering Chromatic Lantern and Astral Cornucopia.

All of those are indeed great - but they're all completely dead cards if you don't need mana fixing.

This, you have a reason to cast even on the last turn of the game.

It may not be much better, but it's "Why do I not own four of this?" good.

That's true. I would instantly put this in a deck. I love Wall of Omens.

Looking back at this now makes me think of Commander's Sphere, which is one of those pushed supplemental product cards and therefore probably not something cards meant to go in a regular set should remind me of.