At that point you either combo off to win the game or probably lose, but after drawing half your deck it's hard to imagine losing
Whenever you surveil, return this enchantment to its owners hand
Palinchron could have made this list as well, for example
You can only activate 1 "Destined Rivals" per turn
Altered Ego Auton Soldier Callidus Assassin Clever Impersonator Clone Copy Artifact Copy Enchantment Copy Land Copycrook Dack's Duplicate Evil Twin Flesh Duplicate Gigantoplasm Jwari Shapeshifter Machine God's Effigy Masterwork of Ingenuity Mirrorhall Mimic Mirrormade Mockingbird Naga Fleshcrafter Omni-Changeling Phantasmal Image Phyrexian Metamorph Pirated Copy Progenitor Mimic Protean Raider Quicksilver Gargantuan Sakashima the Impostor Sakashima's Protege Sakashima's Student Sculpting Steel Stunt Double Synth Infiltrator Undercover Operative Vesuva Vesuvan Doppelganger Vizier of Many Faces Wall of Stolen Identity
They also have several common subtypes, from equipment to vehicles, and its often used as the card type for tchotchke tokens like Treasure, Food, and Blood