Notes & Combos
Like Old Bay Seasoning or Guile's Theme, Fiendsmith goes with everything. You can enable your Fiendsmith engine with just Unicorn and a normal summon. Sometimes you'll link off Retaliating "C" into Maxx "C" as part of your combo-line. I often ended on Desirae or Caesar and a board full of Kashtiras without summoning Arise-Heart. Be careful when using Kashtiratheosis or Special Summoning Riseheart through its effect because you'll be locked into Xzy for the rest of the turn.
Dimension Shifter on turn-1 can end games right away. Big Bang might not be necessary, but can be valuable if all you have is a Shangri'Ira on field. Some fine-tuning of handtraps/board-breakers/tech-cards needs to be done, but otherwise a very fun build.