Black Dragon Ikarina wasn't acting alone. A man with a blue gown was next to her.
It wasn't hard to guess that this was the Ancient Blue Dragon.
The two were whispering, apparently discussing a deal.
Marvin was unable to understand what they were talking about since they used Draconic.
However, Marvin had been discovered by Ikarina before, which reminded him to be more careful as the Dragons' Perception didn't seem to be affected much by the Chromatic Altar or temple.
The strength of Blue Dragons was average, but all the Dragons here were Ancient Dragons.
In fact, even if Marvin had Weeping Sky in hand, facing a Dragon that was able to use magic would be very troublesome.
Dragons were very sensitive to killing intent, so even if he sneak attacked, it might not necessarily go smoothly.
Marvin managed to kill Fati in one move, but this was partly due to luck and the other side underestimating him.