Unfathomable Being

Alex knew this was not her sister's full power. 

The creature's corpse fell to the ground with a big hole in its chest. At first, it was still squirming, trying to regenerate the wound. 

Unfortunately, a crackling sound followed afterward; it sounded like the chirping of many birds. Zold blasted all his electricity from the gaping wound.

His face turned pale, with sweat covering his forehead; it was clear he used almost all his qi and mana in that attack. To make sure the boss stayed dead.

A genderless voice then reverberated in the air, "Dungeon cleared, checking the number of people that survived…,

 calculating clear rank…,

Congratulations, you get a B Rank. 

The portal will be activated, make sure to bring all your loot before leaving."

A text box then appeared in front of them, and a hissing sound started coming out from the portal.

The trio lay on the ground, taking a break from the fight.