Temmet's House of Mirrors (EDH / Commander)

A commander deck all about using mirrors and reflecting all of the best parts of your opponents' decks back at them. Clone-effect creatures like Identity Thief and Mercurial Pretender (which also happen to feature mirrors in their artwork) become copies of your opponents creatures, and making token copies of them with spells like Fated Infatuation, Minion Reflector, and Wake the Reflections can give you multiple, unblockable copies of any creature on the battlefield thanks to Temmet.
What if you want big tokens? Dark Depths can be copied by Vesuva or Thespian's Stage, getting a Marit Lage token for free, and Mirror Gallery make sure you're never limited to just one.
Are your opponents playing too many creatures that aren't worthy of reflecting? Rootborn Defenses + Supreme Verdict, or Hour of Reckoning, or Mirrorweave + Spirit Mirror all provide one-sided board wipe effects.
Wanna reflect instants and sorceries? Twincast, Curse of Echoes, Redirect, Insidious Will, and Split Decision make sure you copy more than just the best creatures from your opponents.
Wanna make infinite mana and tokens for a big finish? Ashnod's Altar + Eldrazi Displacer + Myr Battlesphere and you can use the mana for a big Hour of Eternity with Spell Burst as reusable protection.