Dega Disciple

Three colors of mana to do one color of work: this is white's body, but its abilities pay in black and red, the wedge that gives the Dega creatures their name. That tap-for-an-effect design comes straight from the Apocalypse enemy-pair-and-wedge experiment, where Wizards built creatures whose activations demanded mana outside their own color, forcing wedge manabases just to unlock a 1/1's text. The two abilities pull opposite directions: one shrinks a target creature's power, the other pumps one, both touching power only and never toughness. That restriction is deliberate. A -2/-0 can blunt a blocker or save a creature from a damage race, but it never outright kills, and the +2/+0 grants no evasion or survivability, only a heavier swing. Each effect costs a colored mana plus the tap, so the Disciple commits to one job per turn. As a piece of three-color design it is a museum exhibit of how the wedge sets sold their gold-cost premium: spread the activation across two colors a single-color body could never produce, and let the tension between the colors, not the rate, be the whole transaction.