Relic of Sauron

Grixis has always been the color combination that wants to do everything and never has the mana to do it. The fix here is a single rock that taps for two across blue, black, and red in any split, so it ramps and fixes in the exact three colors that struggle to keep a coherent manabase together. That alone earns it a slot in the shard. What lifts it past the usual three-color signets is that it doubles as a card-selection engine: three mana and a tap loots two down to one. The two modes share the tap symbol, so they are mutually exclusive on any given turn, and that constraint is the whole point. Early, you tap it for mana to accelerate your curve; late, once raw ramp no longer matters, the same artifact turns into filtration instead of sitting dead. It answers the problem that plagues both narrow rocks: a pure mana source goes inert once your curve is spent, and a pure card-draw rock does nothing on turn four. This one shifts jobs as the game changes, without asking you to draw a separate engine to replace it. The discard clause on the second mode is a bonus for graveyard-leaning Grixis strategies that actively want cards in the bin, converting the cost into a payoff. It is a purpose-built tool for a triad that has spent most of its history asking for exactly this trio: fixing, acceleration, and card advantage folded into one artifact.