Specialize allows the player to pay mana and discard a color/land type of your choice to change your card to that new card with its effects (the change depends on which color you discarded)
This is likely because of the policies Wizards of the Coast has to adhere to when depicting guns and gun-like items (such as Squall's gunblade)
Shay Synergies Bounty Hunter and anything that helps with bounty counters (such as Termination Facilitator and Bounty Board ) are the most obvious things to include in a Shay Cormac deck, but there are other ways to get the most out of Shay
For example, if you control Johann, Apprentice Sorcerer ("Once each turn, you may cast an instant or sorcery spell from the top of your library.") and Questing Druid is on top of your library, you can cast Seek the Beast, but not Questing Druid
Most tokens are fairly simple, and youll often find me just using face-down cards to represent them, with tokens of the same kind kept in distinct piles near what generated them when possible