My idea is the following (only for PvP):
There is a small chance, that both players of a PvP game get a modication card in the beginning of the PvP game.
You canĀ“t win that card.
If both players play that card, a small game modification could follow, like this:
Design Ideas:
1. The old brown playing field from earlier versions
2. The back side of the cards changes.
3. No band behind cards, which are ready to play/ ability is ready.
4. Special designs for April 1st, Easter, Christmas...
This shall inspire you to new ideas, people shall play PvP more.
I think this can be hard to be implemented and cause "disconnect errors".