Hi @quantumodo,
Thank you for your reply.
We reviewed the rule: “While a hero is defending against an attack, other friendly characters cannot defend against that attack,” and we believe it specifically refers to “other friendly characters.” Therefore, we believe you should be able to use your hero’s basic defense power even if you have already triggered an effect with the defense label.
We will update our engine to align with this rule in the next version.
Thank you for your understanding!