Orochi

A creature can attempt to sever one of the orochi's eight heads by specifically targeting it and dealing damage equal to the head's HP. A head not completely severed returns to full HP at the end of the attacking creature's turn. An orochi that loses all of their heads immediately dies.

60 feet. DC 37 will

HP 60, multiple heads

Immunities area damage

Weaknesses cold iron 15

Resistances poison 15

The orochi gains an extra reaction per round for each of their heads that remains beyond the first, which it can use only to make Attacks of Opportunity. They can't use more than 1 reaction on the same triggering action, and the orochi must use a different head for each Attack of Opportunity.

The orochi makes a number of jaws Strikes equal to the number of their remaining heads, each against a different target. The orochi's multiple attack penalty doesn't increase until after the orochi makes all of their attacks.

Huge, (2d12+18)[bludgeoning] damage, Rupture 40