[fixed/closed]Mage-Ring Responder trigger when attack is opt

[Aswan jaguar]

Describe the Bug:
Mage-Ring Responder 's trigger when attacking is optional,you can cancel.

Which card did behave improperly ?
Mage-Ring Responder

Which update are you using?(date,name)Which type(Duel,Gauntlet,Sealed Deck)
Manalink 2016/01/15: Battle For Zendikar v2,duel

What exactly should be the correct behavior/interaction ?
Mage-Ring Responder 's trigger when attacking is mandatory.


Are any other cards possibly affected by this bug ?
-

[Korath]

Fixed 04c51fb.