The logic for playing cards, to the extent of what I can see, is just to try and play as many cards as possible as the main priority, and, then, higher mana cards as the second priority (Note:- This is just from watching the bot, I obviously don't have the ability to read the source, so, I may be inaccurate).

There are also some cards that won't hang the bot, but, will still be utterly useless and a waste of mana (Which, the bot stills plays), such as hero weapons (Which, it will play the card itself to invoke the weapon, but, never actually use the weapon to attack anyone). Those cards would be any cards that invoke input from the user (Such as ' Tracking', which requires a card selection, Elven Archer, which, requires a target selection (For it's Battlecry), etc.). Click to expand.The bot has no logic (Currently? Unsure if the bot will just be fully random forever, or, if they'll implement some logic), so, pretty much every card is technically unsupported (as it doesn't play combos and the like), however, some cards that are literally unsupported (And using them will result in the bot just hanging).

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