Ok so here's the idea.
Take infinite turns, get Blightsteel Colossus on the field, equip Blade of Selves and attack.
Use Isochron Scepter to copy Last Chance for infinite turns and you can also use Twinflame to copy your creatures. Time Sieve and Lighthouse Chronologist are great cards to help get extra turns and with Thopter Assembly you shouldn't have any problems with that.
Sundial of the Infinite is a key card for the deck as you'll need this to keep all your wonderful creature copies. Once you have stuff like Flameshadow Conjuring and Sneak Attack out on the field you can cheat out Blightsteel Colossus, pay 1 mountain to make a copy of it and then let the mayhem unfold!
Obeka of course is to end everyone else's turn so you can get back to taking your turns again..
Not entirely sure how this is gonna come out but this is my Colossal Chronology. Enjoy!
Updated!
I've made some big changes to the deck from what I had previously.
Now I'm using Magosi, the Waterveil, Thespian's Stage and Nesting Grounds with Ichormoon Gauntlet, Tekuthal, Inquiry Dominus, Daretti, Scrap Savant and Mindslaver to take tons of turns. With new found info I kept Last Chance to help speed up my Magosi combo, by casting Last Chance you gain an extra turn, then you can activate Magosi's third ability to put an Eon counter on it. Game goes on as normal... or does it?
Take control of other player's turns using Mindslaver and Emrakul, the Promised End. Once you do whatever you wanted to do with them, use Daretti, Scrap Savant to return Mindslaver to the battlefield! Also, yes I know that the opponent that I use Emrakul on gets and extra turn after... I don't think it'll really matter at that point... but we'll see.
Mirror March is another card I think is kinda fun and I'd like to see how it plays out with everything else.
Additionally I still have Lighthouse Chronologist for more turns in big games. Blightsteel Colossus and Blade of Selves is just too much chaos to pass up on and Sneak Attack, Thopter Assembly and Time Sieve is something I'm very much interested in showing off to my play group.
This is the updated Colossal Chronology!
