normaly I play casual game ,when I get more gold I start playing arena . I was watching the bot when playing arena , there was a card the bot keep putting it on the table but it give to option to chose from ,but the bot don't choose one ,so it return back ,and it keep doing the same thing in circle . so I stoped the bot I chose manualy and start agine the bot . It must be one of the new cards when you put it in the table you choose more hp or more attck . if I remember the card name was ( ancient of war ) 5 attck or 5 health .