Two, and neither is a conventional character relic, which is worth knowing before you plan your characters around them.
- Unravelled Fates (15 pts). TZAANGOR SHAMAN model only. In your Movement phase, at the start or end of this unit's move, select one friendly battle-shocked MUTANT unit within 6 inches; that unit is no longer battle-shocked.
This is the detachment's most important card and it is easy to undervalue. A horde detachment's real weakness is not damage, it is battle-shock: a battle-shocked unit has Objective Control 0 and cannot use stratagems, so a cheap Tzaangor unit standing on an objective simply stops holding it. Being able to clear that once a turn keeps your scoring engine running. Note the restriction, though: it is TZAANGOR SHAMAN model only, so if you do not own that specific character, this enhancement is unavailable to you entirely. - Thicket of Bladed Bone, Upgrade (10 pts). SPAWN unit only. This unit's melee attacks have +1 AP and [CLEAVE 1].
This one is an Upgrade on the Spawn unit itself, not a character relic, so no Character carries it and none is needed. It is the cheapest enhancement in the detachment and it is entirely wasted unless you field Chaos Spawn.
Between them, both enhancements are locked to specific datasheets that many Thousand Sons collections do not include. Check what you own before you budget points for either.
(Points come from the Munitorum Field Manual v1.3 and move with updates; confirm in the app.)