Piasa

Notes:

 * Respawned just over an hour after being defeated.
 * Has Enaero that does 30~50 damage with both Shell V and Baraera on.
 * Damnation Dive has an additional Stun effect that lasts longer than usual.
 * Also has a possible hate reset.
 * The hate reset on Damnation Dive seems to accompany its stun effect. If the stun does not land, hate is not reset.
 * Has fairly low accuracy.
 * Has a mild Double Attack rate.
 * Immune or highly resistant to light and dark sleep, bind and gravity.
 * About 1400 XP/person (6 members)
 * Much larger than other birds in the area.
 * Spawns around E-7/D-6
 * Hits fairly hard, blink tanking recommended.
 * Links to and with other birds. Recommend pulling mob slightly down the hill towards the east of its pop area.

Historical Background
Piasa was the name given to a legendary bird in the Mississippi Valley region back in the 1600s. Source.