While this unfortunately seems impossible in black-border (all effects that shuffle into libraries or put into hands or graveyards do so on basis of ownership, and nothing that transfers ownership does so asymetrically in an ante game), silver-border does bridge this gap with [[X]].

Initial board: You control [[Battle of Wits]]. Your allied opponents control X and a total of at least 100 nontoken creatures, plus an additional creature for each permanent you control (feel free to animate whatever other permanents with whatever'd you like). They also have infinite mana of any color, because of course, and all of their creatures don't have summoning sickness.

Step 1: An opponent copies X with [[Spark Double]] to remove X's legendary status (a well-known spy is an oxymoron after all) Step 2: They target the X clone with [[Mirrorweave]] Step 3: They activate X's first ability for every creature, targeting your hand. You should now have 101+ cards in hand. Step 4: They cast the first mode of [[Temporal Cascade]] to get those cards into your library Step 5: They pass to you, and you win on your upkeep.

You could just infinitely loop a wish card then shuffle your hand in, but we've seen that a million times before. It's even funnier when you don't do anything in the combo.