While Exude Confidence isn't defended by a card with equal or greater [Power], the defending hero can't play or activate instants or defense reactions this combat chain.
Instant - [3 Resource]: Exude Confidence gains +2 [Power]. Activate this ability only while Exude Confidence is attacking.
Instant - [3 Resource]: Exude Confidence gains +2 [Power]. Activate this ability only while Exude Confidence is attacking.