Talk:Mušḫuššu, Phantom Dragon Princess/@comment-103.252.200.204-20150112145919/@comment-25316201-20150112191727

To add further to Quackciel's explanation, to attack is to down your SIGNI and declare its attack - this happens before it enters a battle with another SIGNI or deals damage to the opponent's Life Cloth. Therefore, its effect "When this SIGNI attacks, banish one of your opponent's SIGNI." will happen at this time.

If you banish the SIGNI in front of Mushussu as she is attacking, her attack will redirect to the opponent's Life Cloth, resulting in a Double Crush.