Grim Monolith – MTG Proxy Urza’s Legacy

About Grim Monolith

Grim Monolith is a premium Grim Monolith MTG proxy card from Magic: The Gathering‘s Urza’s Legacy set. This colorless artifact is most useful in decks built around fast mana, artifact combo, and big colorless plays, making it a strong option for casual Commander, cube, display, and deck testing.

Mana Cost
Type	Artifact
Text	This artifact doesn't untap during your untap step. : Add . : Untap this artifact.
Set	Urza's Legacy ULG #126
Rarity	Rare

What Grim Monolith Does

Grim Monolith costs two mana and taps for three colorless mana. It does not untap during your untap step, but you can pay to untap it manually.

That exchange makes Grim Monolith a fast mana piece rather than a normal mana rock. It gives you an immediate burst of extra mana, then asks for more mana later if you want to reuse it. In fair games, that means jumping from two mana to a five-mana play. In artifact combo decks, it can become much more dangerous with untap effects or cost reduction.

The main value of Grim Monolith is acceleration. It helps cast expensive artifacts, colorless threats, planeswalkers, and combo pieces earlier than normal. The limitation is that it does not naturally untap, so decks need either a strong one-time burst plan or ways to reuse it without paying the full price every time.

Best Uses for Grim Monolith MTG Proxy

• Artifact combo decks: Grim Monolith pairs with untap effects and cost reducers to generate repeated mana.
• Colorless ramp decks: It helps cast Eldrazi, planeswalkers, and expensive artifacts ahead of curve.
• Commander testing: It is useful for seeing whether fast mana improves your deck or just makes it attract removal faster, a proud Commander tradition.
• Cube environments: Grim Monolith supports artifact ramp, big-mana decks, and high-powered colorless strategies.

Recommended Interactions

Grim Monolith works well with untap effects, artifact tutors, and cards that reduce activated ability costs. When building around it, look for ways to convert the mana burst into a decisive board state or repeatable engine.

• Power Artifact: Reduces Grim Monolith’s untap cost, enabling a classic infinite colorless mana line.
• Voltaic Key: Untaps Grim Monolith for a low mana cost and helps turn one burst into repeated acceleration.
• Manifold Key: Provides another efficient artifact untap effect with extra utility.
• Urza, Lord High Artificer: Turns artifacts into mana sources and supports the same high-density artifact shell.

Cards That Work Well With Grim Monolith

Power Artifact

Power Artifact can reduce Grim Monolith’s untap cost enough to create a repeatable mana loop.

Voltaic Key

Voltaic Key untaps Grim Monolith efficiently, making the mana rock useful after its first burst.

Manifold Key

Manifold Key gives artifact decks redundancy for untapping Grim Monolith while offering unblockable utility in creature builds.

Urza, Lord High Artificer

Urza rewards artifact density and helps convert artifact-heavy boards into mana and card advantage.

Decks That Want Grim Monolith

Grim Monolith fits best in artifact combo, colorless ramp, and high-powered cube decks. In Commander, it is most useful when your deck can either exploit the burst mana immediately or untap it repeatedly. In cube, it belongs in environments where fast mana is intentionally supported.

For deck testing, Grim Monolith MTG proxy is especially useful when you want to compare it against other fast mana options, test artifact combo density, or see whether your deck can turn early colorless mana into a real advantage.

Strengths and Considerations

The main strength of Grim Monolith is explosive mana acceleration from a two-mana artifact. The main consideration is the untap clause. Without support, it may only give one burst of mana. Testing Grim Monolith MTG proxy can help you decide whether it belongs in your Commander deck, cube, or artifact combo package.

Product Quality and Proxy Use

ProxyKing cards are produced with premium print quality, proper trading-card size, ideal weight, consistent thickness, and a natural shuffle feel for sleeved casual play.

This is a proxy/playtest card for casual play, Commander, cube, display, and deck testing where proxies are allowed. It is not an official Magic card and is not tournament legal. Review our Proxy Use Policy for responsible casual use.

Browse more Artifact MTG Proxies.