Eldritch Immunity

Protection from all five colors on a single creature is nothing new: white has offered variations since the earliest days, and Eldrazi have always warped the color-pie rules that constrain everyone else. What makes this a genuine trick rather than a curiosity is the seam between its two costs. For a single colorless mana it protects one attacker or blocker, letting it swing through any colored blocker, shrug off targeted removal that's a color, and win combat against anything painted. The overload line is where it turns into a swing: five mana to blanket your whole team with protection from each color, functionally a one-sided fog against any deck leaning on colored removal or colored creatures to interact. A wrath that reads "destroy all creatures" still gets through because it doesn't target, so the ceiling is bounded; the value is against the vast majority of interaction that names or requires a color. The real design tell is the payment method. That in the cost is a hard requirement for colorless mana, not a generic pip, which means this is not a splashable trick you tuck into any manabase: it is a reward for the decks already built around Eldrazi and the colorless sources that feed them, the ones producing waste and Sol Ring output rather than five colors of Command Tower. Cheap floor, blowout ceiling, and a cost that gatekeeps who gets to cast it at all.