Deckbuilding variant "Chess Champions"

Chess Champions is normal chess except the player selects 2 Champions to battle against an Opponent who selected different champions. The currently 300+ Champions aren’t your usual fairy pieces and I bet you've never seen their kind of abilities before. Each of the Champions replaces one specific chess piece and can’t be stronger than that piece. To gain an advantage you can select champions that synergise well or counter your enemy's Champions.

If you're interested in helping me improve the variant or playtest it feel free to join this discord: 
https://discord.gg/s6kmhNx2
I'm especially hoping for people that enjoy creating fairy pieces.

The Variant is currently only playable IRL and on a Miro Board for online multiplayer.
Here are some pictures of what gameplay could look like(8x8 is still the best but Custom boards look cool.):

The full Miro Board:

Some Pictures of IRL gameplay(100 IRL matches have been played by 10+ people):

The Picture with the paper hats is from around half a year ago when it all started.

Some Bonus Content
In the following picture, you see the "Yugioh Player" Champion. It's IRL only for now, but arguably the most fun Champion in the whole variant. I've written down 3 different decks but as of now I only made the cards for the "Standart Deck".

Here are 4 Champion document Examples:

Best regards
Actimel

For the phone users: https://discord.gg/8Nauhz295R