The Diving Serpent counts down, then submerges — untargetable for a turn — and comes back up swinging for a flat burst that ignores its usual damage entirely.
The countdown resets after the burst, so a long fight against it is a long fight against the same trick on a timer.
How to fight it
- Swing wide when it vanishes: Maneuver's dodge bonus applies to the burst that follows, and that burst is the fight.