rare n huge animal 

Perception +22; low-light vision, scent (imprecise) 30 feet

Skills Acrobatics +24, Athletics +28, Stealth +20

Str +7 Dex +5 Con +5 Int -4 Wis +4 Cha -2

AC  34; Fort +24, Ref +23, Will +20

HP 235

Corrosive Flesh A creature that touches the caustic monitor takes 2d8 acid damage (DC 32 basic Fortitude save).

Gnashing Grip [R] Trigger A creature grabbed by the caustic monitor's jaws fails a check to Escape; Effect The caustic monitor's jaws deal 2d8 piercing damage and the triggering creature is exposed to caustic monitor venom.

Speed 40 feet

Melee [>] jaws +27 (reach 10 feet), Damage 2d10+9 piercing plus 2d8 acid,

Melee [>] talon +27, Damage 2d8+13 slashing plus 2d6 persistent bleed

Improved [>] Grab, and caustic monitor venom Melee talon +27, Damage 2d8+13 slashing plus 2d6 persistent bleed.

Caustic Spray [>>] (acid) The caustic monitor spits a spray of corrosive bile that deals 5d8 acid damage in a 20-foot cone (DC 32 basic Reflex save). It can't use.

Caustic Spray again for 1d4 rounds.

Lurching Charge [>>] The caustic monitor Strides twice, then makes a jaws Strike. If the monitor moved at least 20 feet away from its starting position, it gains a +2 circumstance bonus to this attack roll.

Caustic Monitor Venom (poison) Saving Throw DC 32 Fortitude;

Maximum Duration 6 rounds; Stage 1 4d6 poison damage and enfeebled 1 (1 round); Stage 2 4d6 poison damage and enfeebled 2 (1 round)

Fists of the Ruby Phoenix #1: Despair on Danger Island, page 86.