If theres no removal in play, Tifa will Dolphin Kick her way to victory, all without breaking a sweat
We have a bunch of viable 3-mana artifacts that can ramp into Ugin (and then trigger his static ability to exile an opponent's card once he's in play) but don't forget about Hedron Archive as a low cost way to jump from 4 to 6 mana (7 with your land drop)
The deck is very consistent and gives itself natural protection thanks to all the shield counters it can spread around
Yes, I've finally lost all semblance of a life during my fourteen hour shifts
Between Urzas Saga, Tezzeret, Cruel Captain, and Trinket Mage, there are plenty of ways to nab it without resorting to Game Changers
Its also worth mentioning that this doesnt just happen during your turn, but each turn, so if you have anything that allows you to cast spells from exile on your opponents turns this would trigger then as well