Notes & Combos
Poor man's version of the deck, only crafted 1 each of the extra deck Generaiders (but you probably want 2 of each, I would cut Baronne, Arise-Heart, Sacred Beast). Going second can be rough, but doable, we're playing a pretty high amount of non-engine, and Fenrir threatens out a lot of boards. We can also play around shotgunned Maxx C's too by just Boss Stage pass. Lonefire/Magical Meltdown are great at baiting out the Ash's.
Arise-heart's in there for the Kash matchup, if they go full combo and you draw Fenrir, it's a free Arise-heart -> Zeus clear field line. Double Mechabe since I found myself wanting to reuse the Aleister in hand often enough, and Caliga helps slow the game down on boards of Aleister + Boss Stage -> Harr, and threatens the Ash on Boss Stage since they'll be locked a lot of the time.
Best combo line for me from Loptr + Monstrosity is I:P, Nine-Lives, Harr from Nine-Lives, Boss Stage, next turn Boss Stage into Vala, summon Loptr, cycle Vala into Nidhogg with Loptr. Nine-Lives turns off targeting on Harr and Loptr, I:P can turn into a Unicorn, or use the Loptr and Nidhogg to kaiju off into Underworld Goddess. You can also opt for just Laevatin + Harr + Boss Stage Pass which sets up really annoying boards.