Prismatic Lens

The mana rock that quietly resolved a tension every ramp accelerant of its era faced. Ramp wants to be colorless to stay flexible, but the decks most desperate for ramp are often the ones starved for specific colors, and most two-mana rocks of the period picked a side: tap for a single colorless and stop, like Mind Stone, or commit to one color entirely. This one runs both modes off the same body. Tap it bare and it adds colorless for raw speed; spend a generic mana on the second ability and it filters that mana into any color you need. The colored mode nets you nothing in volume (one mana in, one mana of the right color out), which is the cost that stops it from outclassing every other accelerant outright. What it sells is not extra mana but reliable mana, smoothing a greedy multicolor base the way a fixing land would, except on an artifact that lands a turn ahead of when most lands start mattering. The two-mode template (free colorless, paid color-fixing) has proven durable enough to keep the card in circulation long after flashier two-drops fell off. A modest card measured by any single number, but the design idea underneath it (filter, do not just produce) is the reason it earns a slot wherever a deck needs ramp and color consistency out of the same two mana.