* [CMR] Implemented The Prismatic Piper
* updated commander validation to handle The Prismatic Piper
* created abstract base class for commander variants
* added ability to prismatic piper
* added game init handling
* small revert
* small reorganization of tests
* added some validation tests for piper
* added more tests for piper
* add another test
* added decklist comments to tests
* added some more piper tests
* added another test
* added mana option tests
* added a companion test
* fix conflict
* updated abstract commander to work with Friends forever
* merge fix
* Deck: added details for illegal validation of companion card;
Co-authored-by: Oleg Agafonov <jaydi85@gmail.com>
* simulated games was able to change objects from another games (ConcurrentModificationException, related to d202278ccd, details in 3a6cdd2615);
* AI: fixed cards disappear in multiplayer games with computer (details in #6738);
"Once per game, any time you could cast a sorcery (during your main phase when the stack is empty), you can pay 3 generic mana to put your companion from your sideboard into your hand. This is a special action, not an activated ability."
* Implemented Yorion, Sky Nomad
* Implemented Yorion, Sky Nomad (but for real this time)
* updated game creation to use the correct deck size for limited
