Alloy spears, soft or deadly?

Just now, William properly realised how truly defenseless he was. Although he had gone through several upgrades before, they had been mostly minor in scale. For that matter, he didn't quite have any offensive powers!

In this case, it proved beyond troublesome. That hit from behind had tossed him over ten-meters above the air, and it could have gone worse!

His iron spine took most of the damage, and it had been dented in exchange. Otherwise, that blind attack alone could have ended his life!

As the hero pierced through the air, he grew an urge to attain any kind of new power. Against this whole crowd of enemies, his arsenal wasn't good enough for him to reign victorious.

"Gotta heal my back," He thought.

With some effort, he bent an arm enough to touch his back, and activated the serpent-skill ability afterwards! Such magic wasn't quite powerful, but he managed to heal a fraction of the the pain which thundered across the spine.