When you are involved in a challenge you are either the attacker or the defender. What happens with this is you don't declare a defender? My query is this, Spear Phalanx says response: After you loose a challenge as a defender kneel spear phalanx and kneel 3 influence to choose and discard 1 attacking character from play.
I am a defender if I don't declare a character to defend with? or does the SP have to be the defender?