Card intelligence brief
This artifact doesn't untap during your untap step.
{T}: Add {C}{C}{C}.
{4}: Untap this artifact.

Sales, inventory, and broader Magic demand signals for Grim Monolith.
RSG intelligence changes as sales, inventory, and market signals change. A demand signal is not a binding purchase offer.
Start with the closest functional alternatives, then narrow by what matters for your deck.