Fast mana acceleration is one of Magic's most powerful effects, and Grim Monolith delivers an immediate mana advantage by producing three colorless mana for just two mana invested. Decks focused on expensive artifacts, Eldrazi creatures, or colorless spells benefit enormously from this explosive ramp. The artifact shines in combo decks that need quick access to large amounts of mana, and in artifact-based strategies where the colorless restriction matters less than the raw acceleration.
Format Notes
Legacy and Vintage represent the primary homes for Grim Monolith, where fast mana effects are legal and highly valued. The card sees consistent play in various combo decks and artifact-based strategies in these eternal formats. Commander players also embrace it as a powerful ramp spell, particularly in decks running expensive commanders or artifact-heavy builds where the colorless mana isn't restrictive.
Combos & Synergies
Power Artifact creates an infinite mana combo by reducing the untap cost to just two mana, generating unlimited colorless mana. Voltaic Key provides cheaper untap effects, allowing multiple activations per turn for explosive mana generation. Rings of Brighthearth doubles the mana output by copying the tap ability, effectively producing six mana for the investment of four mana to untap and activate twice.
: Add 
: Untap this artifact.
