This deck is built on the back of Synthetic Destiny and Mass Polymorph. The concept I was going for was finding a Terror of the Peaks combination that would kill everyone with as few creatures as possible. To be honest, I don't know that my current setup is "Ideal" but most of the alternatives I poked at required more cards and weren't as sticky.
So obviously my goal is to get 5+ creatures / tokens in play and then mass polymorph them off into our only five creatures: Terror of the Peaks, Fiendish Duo, Angrath's Marauders, Gisela, Blade of Goldnight, and Avacyn, Angel of Hope. If this ideal situation happens without interaction from my opponents we will ultimately end up with: 64 damage, 40 damage, 32 damage, and 40 damage as damage doubler effects stack.
This is probably enough to kill most boards. Including Avacyn, Angel of Hope into this mix doesn't add a ton but it makes it far harder to spot remove interact with one of the damage dealers which is going to be one of the bigger ways to shrink our damage. If someone does have exile our bounce spot removal having Avacyn in the mix also makes it more likely that we exist to the point where we can attack with some of the creatures as well. I found a few other things that would give more output but they increased the number of targets I was looking at and didn't seem to make things better than just using Avacyn.
It is possible that I should add more counter magic to defend the mass poly effect itself such as Fierce Guardianship, Pact of Negation, or even go down the option of silence effects but that sounds like something I would explore more if I ever build this abomination lol. I was sort of looking to build a combo like deck that isn't infinite which is part of why I got to where I am here. This is totally a combo deck but given how much commitment to the build there is, I felt like it was more interesting than something like Thassa's Oracle ever could be. There is also a lot more counter play to this concept while also imposing a lot of deckbuilding restrictions on me.
Decklist
Approximate Total Cost:
Well, thats the rough draft.... I have no idea if I will ever make it but it was kinda fun to construct lol.