Tzeentch
Boon of Tzeentch
The new spell card provided by the Boon of Tzeentch is drawn randomly from one of the eight Colour of Magic decks chosen by the caster. Though this works like wizards drawing their spell cards at the start of the game the wizard can't decide to discard his first draw and draw again. It is possible for a Tzeentch wizard to build up a considerable repertoire of spells by the end of the game by using the Boon of Tzeentch, giving him an advantage in Mental Duels and the like.
Tzeentch's Firestorm
To use this spell effectively the player must have Pink Horror models. If the models are not available the Pink Horrors are not created. It may be possible to place the Pink Horrors created by this spell directly into hand to hand combat with the survivors of the Firestorm. If this is done the enemy unit will have to take a fear test immediately as if they had been charged by the daemons (providing they are not exempt from fear) but no blows are struck until the next hand to hand combat phase and neither side counts as charging.
Nurgle
Plague Wind
As with Tzeentch's Firestorm you will need Plague Bearer models to use this spell to its full effect. If you don't have the models available then the Plague Bearers are not created. Plague Bearers can be placed directly into hand to hand combat with the survivors of the Plague Wind in exactly the same way as with Tzeentch's Firestorm.
Stench of Nurgle
Champions, Sorcerers and Daemons of Nurgle are not affected by this spell. Warriors of Chaos are not affected if the entire unit is obviously composed of Nurgle Chaos Warriors, or if the unit is led by a Champion of Nurgle.
Miasma Of Pestilence
As with the Stench of Nurgle Champions, Sorcerers and Daemons of Nurgle are not affected by this spell. The same comments apply.
Slaanesh
Acquiescence
Though Acquiesence has a continuing effect the spell card itself does not remain in play. This means it can be cast on other victims in subsequent magic phases even if the first victim is still affected.
Beam of Slaanesh
Like Acquiesence the Beam of Slaanesh has a continuing effect but the card itself does not remain in play, so it too can be cast on other victims in subsequent magic phases.