This card caught my eye. It is basically a better Sphere of the Suns. Aside from doing what Sphere does, this mana rock also allow you to save up mana between turns, meaning that if you play this at turn 2, it can ramp you to 6 mana on turn 4, just like a coalition relic.
It is better than sphere of the suns, but not by that much, and sphere hasn't been good in a long time. I think this is worse than every signet and talisman, and mindstone, and maybe liquimetal torque? So unless you really need more 2-drop ramp or really need treasure tokens, I think this is an easy pass.
I like this card quite a bit. It compares most to Coldsteel Heart, IMO, since they both ETB tapped and can give you any color. This has a lot of advantages over Coldsteel Heart since you can stash your treasures for a single turn, you're not locked into a single color, and the treasures can help out with critical mass for artifacts. The only real advantage that Coldsteel Heart really has over this is that it can be used more than 3 times and isn't randomly screwed over by Manglehorn's static ability. I think this is one of the better 2-cmc mana rocks that only taps for a single mana that isn't part of a cycle (talismans / signets), like Mind Stone / Coldsteel Heart / Liquimetal Torque / etc.
I didn't think much of this card the first time I saw it but in retrospect I think it looks really good. Banking mana is very powerful (6 drops on turn 4 is good, while 8 drops on turn 5 is Grim Monolith-adjacent) and there’s actually a ton of super powerful artifact synergies with this card. Looks really good imo, way better than Sphere of the Suns as a color fixer, almost like a Coalition Relic-lite, and Coldsteel Heart etbs tapped and is still one of the best 2cmc rocks so I don’t think the etb tapped downside is too bad for a mana accelerant like this.
This card caught my eye. It is basically a better Sphere of the Suns. Aside from doing what Sphere does, this mana rock also allow you to save up mana between turns, meaning that if you play this at turn 2, it can ramp you to 6 mana on turn 4, just like a coalition relic.
Furthermore it gives you a total of 4 artifacts that can be sacrificed to, and have synergy with cards such as: Daretti, Ingenious Iconoclast, Daretti, Scrap Savant, Goblin Welder, Saheeli, Sublime Artificer, Braids, Cabal Minion, Tinker, Pia and Kiran Nalaar, Tangle Wire, Smokestack, Mayhem Devil, Ravenous Squirrel, Voltage Surge, Kuldotha Forgemaster, Arcbound Ravager, and cards with metalcraft (Galvanic Blast) or affinity for artifacts (Thought Monitor).
Basically a good card for any cube that runs an artifact, sacrifice or stax theme.
375 unpowered cube - https://cubecobra.com/cube/list/601ac624832cdf1039947588
Making multiple artifacts is always more valuable than is intuitive (smoke stack, tolarian academy, constructs, tanglewire).
Don’t think it’s as good as a signet, but it’s in the same league
Last Updated 02/07/24
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EDIT: Enters tapped is a bummer but I think it is still worth it given the artifact interactions.
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This card is also absolutely broken with Urza, Lord High Artificer, Tinker, Upheaval, Tolarian Academy, Tezzeret the Seeker, all the Karnstruct token producers (Karn, Scion of Urza/Urza's Saga/the aforementioned Urza, Lord High Artificer), and even has some more cute synergies like Oko, Thief of Crowns/Ral Zarek/Teferi, Time Raveler. It's also insane with Tezzeret, Agent of Bolas and all the Goblin Welder effects but we don't play those in our cube.
Will probably end up trying it over a Boros Signet or something.