When casting a spell that targets, if my opponent has a creature with Ward, I am of course prompted to pay for Ward. However, when casting Circle of Confinement (a support that targets) I am not prompted to pay for Ward, so Circle cannot target a Ward creature at all.
Hello @zzedar,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me 
Rebeca.