We put forward a new approach to mechanism design, and exemplify it via a new mechanism guaranteeing significant revenue in unrestricted combinatorial auctions. Our mechanism ? succeeds in a new and very adversarial collusion model; ? works in a new, equilibrium-less, and very strong solution concept; ? benchmarks its performance against the knowledge that the players have about each other; ? is computationally efficient and preserves the players' privacy to an unusual extent.