Additionally, if a Daemonhost dies, there is the chance that the body can continue to serve the Daemon, even in death. Perform the same test as above if a Daemonhost Character dies. If the Daemon is victorious, the body lives on in undeath. The Daemonhost is automatically Terrifying, but loses all Sg and Ld, any Wyrd powers it might have had, as well as all other skills.
Also, the host body will rot and become useless eventually. In a campaign setting, roll 2D6. This is the number of weeks it takes for the corpse to deteriorate into nothingness. When the corpse is gone, the Daemon must find another host, or go back to the Warp.
The GM can add more to this or alter it accordingly if they want. Remember the body is dead, but the Daemon can still use it!

Now these rules are hardly finished, and barely holeproof. But they were interesting in the Campaign I'm running, as two of the players have Daemonhosts in their warbands, and both have turned.
The first, so far, has been brought back under control, thanks to campaign events working in it's leader's (a Xanthite Inquisitor) favour - but it's not the same as it used to be. I kept all the stat and ability changes for it, and made it lose 1 Speed and D3 more powers as it was brought under control - the Inquisitor hasn't quite learned enough not to have damaged it. But he will eventually.
But because of this, he has to test all the time now, otherwise his Tzeentchian Daemon goes haywire :)
But I also gave him a bonus power to help him along, and here it is, in case you want to use it yourselves.

This way, the Inquisitor can capture other Daemonic entities (which fits with his background), and keep his Tzeentchian follower in check for a short amount of time - usually after it breaks loose again! (though after a few fireballs, the thing will break open again >:)
The psychic bolt thing added to the persistent keeps it not-quite-so-powerful, and since it can be used on almost anyone, well, it'll come in handy later on, I'm sure.

While we're on this...

Here's a couple of Daemon - related psychic powers

Name	Difficulty	Type	Description
Summon Warp Entity	Entity's Willpower	Ranged	This power summons a Daemon or other warp entity onto that battlefield, sort like in 40k how daemons are summoned. This would be one of the hardest psychic powers to use and probably couldn't be used very often. Of course, the psyker would have to concentrate for a while to be able to use the power. Also, if the psychic test is failed, the character would loose double the willpower he would normally loose and would take D3 damage for every 10% he failed by. If he failed the test by more than double the amount he needed to pass by, he would either be possessed by the daemon, or is torn apart by the daemon in the warp and be killed instantly (a 50% chance for each).
Bind	Entity's Willpower	Ranged	This is the psychic power used to bind Daemons to weapons and other objects, including people. It probably would not be used during battles, more likely after all hostile characters are out of action and/or gone. The psychic power can only be used if the daemon is stunned or out of action, but not dead. If the daemon is out of action, the difficulty if halved. The psyker must be base to base with the daemon and must have with him the object to be bound. If the psychic test is passed, the daemon must pass a willpower test with a deduction from its willpower equal to the ammount the psychic test is passed by. If the daemon is stunned and it passes the willpower test, it regains its senses and automatically gets D6 actions. If the daemon is out of action, it regains conciousness and D10 wounds, but does not get any free actions. If the daemon fails the willpower test, it is bound to the object and counts as having daemonic properties determined by the GM's discression.

The Daemon would be summoned D10 inches from the summoner in a random direction. When the daemon appears, the summoner must take a Leadership test (A use for Leadership!) to control the daemon, with a negative modifier to his leadership of 10% for every full or partial 10 that the daemon has above 50 for its Willpower. If he passes, the daemon counts as a member of the psyker's warband and is commanded by verbal or telepathic commands from the summoner, if the psyker does not spend an action commanding the daemon, the daemon takes a Leadership test, if passed the GM chooses if the Daemon continues to follow the summoner's orders or goes off on its own. The daemon is no longer controlled by the player if it passes its Leadership test.

After being summoned, if the psyker fails his Leadership test, the Daemon automatically charges him. The GM controls the daemon as an NPC from thereafter. If the summoners tries to give the deamon instructions telepathically the deamon will attempt to use this path to directly possess the psyker, but becauseof the direct link the psyker gains no benifits fromanthing like psychic hoods, pentagrammic wards etc.
Deamons all have the ability to possess characters, as per the Summon Warp Entity, although the targets willpower is used for the difficulty. If it passes it partially possesses the unfortunate character! (Fully Possesses if it gets under 5)
Also, for every turn a deamon does not have a host it has to make a willpower test, if failed it suffers the amount of wounds for the % that it failed the test by, as the strain of keeping a precience in the material realm is to great.

Brian

Equipment:

Special Abilities:

Summoned:

Deity:

Stats:	WS	Bs	S	T	I	Wp	Sg	Nv	Ld
Daemonic Beasts	75	0	60	45	75	55	10	100	10
Lesser Daemon	75	0	60	60	60	70	50	100	30
Daemon Prince	100	0	225	150	100	100	90	90	95
Greater Daemon	120	0	270	225	100	100	90	90	100
Beast Random	65+2D10	0+2D6	55+2D6	35+2D6	65+2D10	45+2D6	2D10	60+4D10	2D10
Lesser Random	65+2D10	3D10	55+2D6	55+2D6	55+2D10	50+4D10	45+2D6	60+4D10	3D10
Prince Random	80+4D10	5D10	200+4D10	125+4D10	80+4D10	80+3D10	80+3D10	80+3D10	80
Greater Random	100+4D10	9D10	250+4D10	200+4D10	80+4D10	80+4D10	80+3D10	80+4D10	80

You then apply the previous modifications to stats, depending on the Daemons patron God.