If Reiji wasn't mistaken, the young man just used a normal Energy Bullet on his first shot.
He's probably gauging the power of his bullets against this powerful creature. Anyway, he didn't have a chance to use them against other Evil Beasts so he could understand the young man's curiosity.
On the other hand, Reiji felt that Mourad should've considered using his Arcana's Awakened Skills to deal lethal damage on the Wyvern's head. Because right now, the flying beast has become wary of him and perhaps, Mourad would have difficulty landing a clean hit again.
'It wasn't that effective but that still created a bit of scratch on its body…' Reiji mused after seeing the Wyvern's sturdy body…
Boom! Boom! Boom!
He then saw the various Arcane Magic of the Half-Imps being thrown to the beast. Since the Wyvern is alone, everyone is focused on hitting it and even if their magic isn't that powerful, it could still push it back!
Roooaar!!