Instead of moving in their Movement phase, any CHAOS CHARACTER can, at the end of their Movement phase, attempt to summon a DAEMON unit with this ability by performing a Daemonic Ritual (the character cannot do so if they arrived as reinforcements this turn, or if they themselves have been summoned to the battlefield this turn). 

If they do so, first choose one of the four Chaos Gods - KHORNE, TZEENTCH, NURGLE, or SLAANESH. A CHARACTER who owes allegiance to one of the Dark Gods can attempt to summon the units of their patron - for example, a KHORNE CHARACTER could only attempt to summon KHORNE DAEMONS. 

Roll up to 3 dice - this is your summoning roll. You can summon one new unit with the Daemonic Ritual ability to the battlefield that has a Power Rating equal to or less than the total result so long as it has the same Chaos God keyword you chose at the start (in the case of units that have the choice of allegiance, such as Furies, the unit when summoned will have this keyword.) This unit is treated as reinforcements for your army and can be placed anywhere on the battlefield that is entirely within 12" of the character and more than 9" from any enemy model. If the total rolled is insufficient to summon any unit, the ritual fails and no new unit is summoned.

If your summoning roll included any doubles, your character then suffers a mortal wound. If it contained any triples, it instead suffers D3 mortal wounds.

Profiles:

Unit	M	WS	BS	S	T	W	A	Ld	Save
Cor'bax Utterblight	*	*	4+	6	8	12	*	10	4+

Wound Track	Remaining W	Characteristic 1	Characteristic 2	Characteristic 3
Cor'bax Utterblight	-	M	WS	A
Cor'bax Utterblight1	7-12+	7"	2+	5
Cor'bax Utterblight2	4-6	5"	3+	4
Cor'bax Utterblight3	1-3	3"	4+	3

Abilities
Daemon Prince of the Ruinstorm: If an enemy Psyker is within 9" of this model, their player must subtract 1 from their rolls to manifest psychic powers for that Psyker. Friendly models within 9" attempting a Daemonic Ritual can also re-roll their summoning roll when doing so.
Poison Slime: Each time Cor'bax Utterblight successfully completes a charge move, roll a D6 for each enemy unit within 1". For each roll of a 2+, that unit suffers a mortal wound.
Noisome Tide of Flesh: Cor'bax's feculent mass is a seething, half-liquid horror that simply flows over obstacles and swamps anything, be it blade or bullet, that strikes it, with little outward effect. Cor'bax ignores any penalty to charge rolls made for him because of terrain. In addition, when making rolls for Cor'bax's Disgustingly Resilient ability against wounds caused by attacks with a Damage of 1, wounds are ignored on a 4+.
Putrid Demise: When this model is reduced to 0 wounds, roll a D6 before removing it from the battlefield; on a 4+ it explodes in a tide of filth, and each unit within D6" suffers D6 mortal wounds.
Daemonic: Units with this ability have a 5+ invulnerable save.
Disgustingly Resilient: Each time a model with this ability loses a wound, roll a dice; on a 5+, the model does not lose that wound.

Used By (1)

Chaos - Daemons(Catalogue)