anyone whos lost a chess piece and replaced it can tell you that its just not the same as playing with all your pieces being, somehow, proper
With Pyrohemia in battlefield you can control the game easily, and there's also Rite of Passage giving you offensive power and more toughness for your creatures to endure more damage
His WUBRG activated ability wont come up super often, and I think I like this approach to granting five-color identity to legendary creatures, as it takes the focus off of pushed Commander designs and makes the card not too broken
If you feel like the manas in your favor, there are other cards with squad from the Warhammer 40,000 precons that would supplement cards like Gary Clone
A great example is Aetherdrift , where the zombie faction played a huge role and really boosted the tribes presence, so it's worth looking at those to uncover zombie hidden gems
Dissipate is the truth