While "Fusion Destiny" (as well as "Destiny HERO - Doom Overlord") locks the player out of Special Summoning non-DARK "HERO" monsters, most of the consistent "HERO" extenders and strong endboard pieces (i.e., all "Vision HEROes", "Masked HERO Dusk Crow", "Masked HERO Dark Law", "Masked HERO Anki", "Contrast HERO Chaos", and all "Xtra HERO" monsters sans "Xtra HERO Wonder Driver") are "DARK", so "HERO" decks can still build a competent field even if the player has to use "Fusion Destiny" as their early combo starter
No matter how solid your board is, it will all be swept away by "OP01-094 Kaido"
Windfall is a great card in duels, but in a larger multiplayer environment, it often will help your opponents more than it helps you
Final point of note is that Agent is an artifact which increases his potential synergies while not being an issue in regards increase susceptibility to removal as you don't overly care about the body once you have cast it
With Wilds of Eldraine arriving later this year, be sure to visit your local game store for the prerelease on September 1st or join Magic: The Gathering Arena for its launch on September 5th.
continue attacking with Umastryx and the new Nemesis Warrior: 8800 total Thats all for my profile, Ill leave the rest to your testing and to hopefully future builds utilizing new support