Grim Monolith does not untap during your untap phase.
{T}: Add three colorless mana to your mana pool. Play this ability as a mana source.
{4}: Untap Grim Monolith.
Part prison, part home.

• Number: 126
• Rarity: R
• Type: Artifact
• Mana cost: 2
• Color: Artifact
• Artist: Chippy