Flux Slaad
Medium elemental humanoid
Level 9 Skirmisher XP 400

Initiative +8        Senses Perception +10; low-light vision
HP 98; Bloodied 49
AC 23; Fortitude 23, Reflex 21, Will 21
Resist 5 variable; Vulnerable 10 variable
Speed 7, teleport 2

Claw Slash (standard, at-will)

+14 vs AC; 2d8+3 damage.

Flux Rage (standard, recharges when first bloodied)

The flux slaad shifts 2 squares and makes one claw slash attack against each creature it moves adjacent to during the shift.

Piercing Reaction (immediate reaction, when the flux slaad takes damage from an attack; at-will)

The slaad shifts 1 square.

Slaad Vulnerability Shift

A flux slaad starts the encounter with vulnerable 10 to one of the following six damage types, randomly determined: 1—cold, 2—fire, 3—lightning, 4—necrotic, 5—psychic, or 6—thunder. It has resist 5 to the other five types. When the slaad takes damage of the type to which it’s vulnerable, its vulnerability changes to one of the other five damage types, randomly determined, and it gains resistance to the type it was previously vulnerable to.

Alignment Unaligned        Languages Common, Primordial
Str 16 (+7)      Dex 15 (+6)      Wis 13 (+5)
Con 18 (+8)      Int 7 (+2)      Cha 14 (+6)

Published in Monster Manual 2, page(s) 184.