Jenson Carthalion, Druid Exile

The reward is tiered by how hard you work for it, and the distance between the two rungs is the point. Any multicolored spell clears the first bar (two colors is enough), and casting one nets the scry: a filtering effect that turns a deck built on gold cards into a run of smoothed draws. The top of the ladder asks for the rarest cast on the board, a spell that is all five colors at once, and paying that tax hands you a 4/4 flier with vigilance, a real body for a real ask. What makes the design feel self-contained is that the activated ability bridges floor and ceiling from the same permanent. Five mana and a tap produce the full WUBRG line: no net mana, so not ramp, but the exact color fixing needed to hard-cast something that satisfies the all-colors clause. A two-mana Human Druid becomes its own enabler for the payoff its trigger wants most. The intended arc reads cleanly: deploy early, scry through the midgame off ordinary gold spells, then eventually turn on the rainbow filter to cash the Angel. Nothing about a green-white front face restricts the deck's fixing (as a commander he carries a WUBRG color identity, and any deck running him can support the mana on its own), but the card is built so it never has to lean on that. It supplies the last color you need to complete its own best trigger, which is a rare thing for a design to offer this openly.