Price$0.21 – $1.49
Buy on TCGplayerSky Diamond
Artifact
LegalRampRank #754
This artifact enters tapped.
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Why is this card good?
Sky Diamond is a budget mana rock that fixes for blue, but it's one of the weaker options in its slot. Entering tapped is a real downside in a format obsessed with tempo — you can't ramp into a turn-3 play the turn you cast it, which is exactly what you want from a 2-mana rock.
Compared to alternatives, it loses badly. Arcane Signet, Mind Stone, Fellwar Stone, and even the much-maligned Sol Ring all do more for the same or less mana, and most enter untapped. The Diamond's only real edge is that it taps for blue specifically and is dirt cheap.
Play it in mono-blue or heavily blue decks on a tight budget where you've already exhausted the better rocks and just need bodies. Mind Stone is strictly better in most builds since it cantrips late.
Skip it in any optimized or even moderately tuned list — there are simply too many superior 2-mana rocks competing for the slot.
Related cards
Mind Stone
2-mana rock that taps for any single color in mono-blue and cantrips later.
Sapphire Medallion
Reduces blue spell costs, blue-specific mana acceleration.
Star Compass
2-mana rock tapping for basic land colors, enters tapped similarly.
Coldsteel Heart
2-mana rock entering tapped that produces one chosen color like U.
Fellwar Stone
2-mana rock that often makes blue off opponents' lands.
Arcane Signet
2-mana rock producing your commander's colors including blue.
Talisman of Dominance
2-mana blue-producing rock, upgrade over Sky Diamond.
Sol Ring
Premier 2-mana ramp staple in any blue deck.
Printings (13)
Played by these commanders
Ranar the Ever-Watchful100% of 1
Millicent, Restless Revenant100% of 1
Isperia, Supreme Judge100% of 1
Teferi, Temporal Archmage100% of 1
Wilhelt, the Rotcleaver100% of 1