Changehost of Deceit plus Ritual of Regeneration: The Durable 3-DP Thousand Sons List

There are three separate reasons, and the third is the one people miss.

First, they stack two different kinds of defence. Changehost of Deceit's Daemonic Illusions gives your Scintillating Legions units a 4+ invulnerable save against ranged attacks while a Thousand Sons Psyker unit is within 6 inches and visible. Ritual of Regeneration's Sorcerous Invigoration heals D3 wounds on any Thousand Sons Psyker unit that successfully manifests a Ritual. One reduces the damage that lands; the other undoes the damage that got through. They apply to different halves of your army, so they do not overlap wastefully.

Second, the daemons make the healing more frequent. This is the interaction worth building for. Changehost's Mortal Sorcery grants the Cabal of Sorcerers ability to a Scintillating Legions Psyker unit standing within 6 inches of your Thousand Sons. That is another model able to attempt a Ritual. The army rule caps you at one attempt per model and four Rituals per turn, so the practical limit on your healing is how many eligible casters you own, and daemon Psykers are a cheaper way to buy caster bodies than more Sorcerers. More casters means more manifested Rituals, and every manifested Ritual is another D3 healed.

Third, both rules demand the same 6-inch formation. Daemonic Illusions, Mortal Sorcery and the healing all want your daemons and your Thousand Sons standing close together with visibility between them. This is not a list where you deploy the allies on a flank. It is a single dense battle line, and that is a simple thing to execute.

Deploy interleaved. Every aura here is 6 inches and requires visibility. A daemon unit out of range of your Psykers has no invulnerable save against shooting and cannot cast, and a Thousand Sons unit out of range of a daemon Psyker gets nothing back. Mix them.

Cast with the units you want healed. Sorcerous Invigoration heals the manifesting unit, not a unit of your choice. So the sequencing question at the start of every Shooting phase is not just which Ritual to attempt but which unit should attempt it, and the answer is usually whichever hurt Psyker unit can reach a legal target.

Attempt the cheap Rituals first and unchannelled. Destiny's Ruin at Warp Charge 5 is a comfortable roll on 2D6, and because the mortal-wound risk only applies when you Channel the Warp, an unchannelled attempt is completely free. A failed attempt heals nothing, so reliability is healing. Save Channelling for the turn you genuinely need Twist of Fate at Warp Charge 9.

Take Curse of Life. At 20 points it adds 3 to every heal from the detachment rule, turning a D3 into 4 to 6 wounds. In a list built around healing repeatedly, it is the single best value enhancement available to you.

Take Nethershriek Mind-Eater on a daemon. At 10 points it is the cheapest enhancement in the faction and the only one a daemon character can carry, so it costs you nothing your Thousand Sons characters wanted. It forces a Battle-shock test on an enemy unit within 12 inches and deals 3 mortal wounds if it fails.

Remember the mustering caps and the Warlord rule. You may include up to 1,000 points of Scintillating Legions units at Strike Force, and no daemon model can be your Warlord.

Not a decklist, because points move with every dataslate. A shape.

• A Thousand Sons core of [Rubric Marines](/40k/boxes/warhammer-chaos-space-marines-thousand-sons-rubric-marines-new-in-box), holding the middle. They receive Mortal Sorcery from nearby daemon Psykers and they are what the daemons form up around.
• Two or three Psyker characters, which is where the list's engine lives. Ahriman projects the 6-inch bubble that switches on the daemons' invulnerable save, Exalted Sorcerers give you a second bubble for the other flank, and the Infernal Master is the cheap way to add a third caster. One of them carries Curse of Life.
• Up to 1,000 points of Tzeentch daemons, including at least one daemon Psyker so Mortal Sorcery has something to grant the army rule to, and a Lord of Change to carry Nethershriek Mind-Eater. No box is linked for any of these, because our catalog has no exact entries for the Tzeentch daemon datasheets. That is a real gap and we would rather name it than send you to an approximate kit.
• [Scarab Occult Terminators](/40k/boxes/warhammer-chaos-space-marines-thousand-sons-scarab-occult-terminators-new-in-box) as the one unit that can win a fight outright, since neither detachment adds much offence.

Be honest about the weakness: neither detachment adds damage. This pairing is built to not die and to score, and it will beat opponents who cannot remove you while losing to opponents who out-damage you faster than you heal. If that trade does not appeal, build Warpforged Cabal plus Sekhetar Cohort instead.

For the fundamentals underneath all of it, read the Thousand Sons army guide.