A little deck my brother made which I thought I'd share. We are only semi competitive and lacking in experience but this deckbuild aimed at bringing out Kairos's ability quickly seemed fun. Basically the Lord of Change must try and bring out Kairos as soon as possible. Corruption is also a key component, used to weaken the enemy prior to attacks. In a large part themed around Chaos, it does have a few non Tzeentch flavored cards but those were acceptable concessions I think.
Kairos Fateweaver 2x -> Development orientated.
Lord of Change 2x -> get some cards like Kairos quickly.
Melekh The Changer 2x -> Can be very offensive in this deck.
Blue Horrors 3x -> Stalls/fodder
Marauder Chieftain 3x -> defensive sniping
Sorcerer of Tzeentch 3x -> Development orientated.
Herald of Change 3x -> defender
Bloodsworn 2x -> some extra punch
Maledictor of Tzeentch 3x -> can be nasty if used well
Shrine to Nurgle 3x -> corruption!
Desecrated Temple 3x -> nice little support
Warpstone Meteor 2x -> corruption!
Tainted Well 3x -> punish corruption!
Contested Village 3x -> solid in most decks
Armoury 2x -> there will be plenty of developments
Innovation 2x -> exploit developments
Seduced by Darkness 3x -> must-have corruption card
Cloying Quagmire 3x -> corruption and damage!
Seductive Delusions 3x -> corruption and damage!
Spreading Darkness 3x -> power through corruption
Flames of Tzeentch 2x -> Fluffy and can soften up prior to an attack!