The soldiers stood in awe at the figure seemingly cloaked in nothing. The only reason they could currently see them was because of the blood that stained the cloak showing their outline. But even that was slowing disappearing as the rain washed it away.
The figure had saved their lives. They came in a flash of lightning seemingly bringing the storm with them. They appeared and changed the tide of battle, hacking and slashing their way through it clad in a cloak of invisibility, an eerie green glow coming from under the hood. In their right hand a silver sword encrusted with rubies the color of blood.
It, not he nor she, it. It was a monster, an angel of death.
When there were no longer enemies within reach, it would seemingly disappear in a gust of wind as it reappeared by another enemy cutting it down. Spells and swords flew at the figure but nothing hit its mark besides the lightning striking at its enemies and of course its sword.
Once all of the enemies were slain, the lightning stopped as did the green glow. It just stood there in the downpour letting the blood wash off to the red mud below, the sword retreating back into the confines of the cloak.
The soldiers hardly dared to breath let alone move until what little was left of the figure disappeared in a gust of wind to another part of the battlefield as lightning streaked the sky and thunder was heard once again.