Lein noticed that the terrorist he was fighting was doing something out of the norm. He was no longer in his usual battle stance and it seems like he was more on the defensive. Thus, Lein tried to poke his defences with his usual lightning attacks to see whether there were any deadly counters while maintaining a distance.
The first wave of lightning bolts that were shot out from Lein's sword did not feel like he had done any damage to the eagle who was hovering in midair. In fact, Lein predicts that the lightning bolts had been absorbed by some barrier and that already alerted him to be wary of his current opponent's new stance.
Taking indefinite hiatus, rewrite chaps and post at times. tyvm