Editing Warhammer 40,000/8th Edition Tactics/Eldar (section)

====Revenant Discipline====

{{W40Kkeyword|Ynnari Psyker}} units replace either their access to the Runes of Battle or Runes of Fate disciplines with this one. These powers allow them to play both a supportive and offensive role for army. A reminder, {{W40Kkeyword|Ynnari}} units can no longer select or benefit directly from any Runes of Fate and Battle, as they cannot be targeted by them anymore. Offensive powers from allied vanilla detachments such as Executioner and Mind War are good powers to take on an allied vanilla detachment supporting a Ynnari one, as they can help trigger SfD or be used to help trigger stratagems or Tactical Objectives.
#'''Gaze of Ynnead:''' Essentially Smite on crack, this WC 6 power lets you choose the target, and deals mortal wounds based on a D6; a roll of 1 results in 1 mortal wound, 2-5 causes 1d3 mortal wounds, and a 6 results in 1d6 mortal wounds on the target; the total expected mortal wounds is, accordingly, 25/12, or slightly more than 2.
#*Like all non-Smite Psychic Powers in 8th, this is worse than Smite: the odds of it going off base are down from 30/36 to 26/36, so the total expected output is only 1.5 mortal wounds.  For comparison, Smite deals 1.79 (both results assume the Psyker survives Perils on double 6).  What's surprisingly nice here is that the reduction is small compared to two significant trade-offs: the first is that you can pick the target, and the second is that your Warlocks can cast it without a wacky special rule nerfing your mortal wound output.  Still not a great power, but other disciplines definitely have worse.
#*The math changes for both Yvraine and a Farseer, and for any other buff you can come up with to casting the power.  However, any buff that increases the casting total, like Yvraine's, tends to make Gaze ''worse'', not better: Yvraine's Gaze deals 1.74 mortal wounds, but her Smite deals 2.08.  In other words, normally Smite does 19% more mortal wounds than Gaze, but for Yvraine, it deals 20% more.  The difference is negligible, but will accumulate as you incorporate more buffs, like spending CP to re-roll her cast.  It can be a solid offensive tool in the hands of Yvraine, but you'll ideally pick it up mid-battle when some of her warlock meat shields get chewed up rather than starting out with the power.
#'''Storm of Whispers''' An AoE aura attack, this WC 6 power lets you roll 3d6 per enemy unit within 6" of the caster; every roll of a 6 hits the unit in question with a mortal wound.
#*This power is hot garbage.  Assuming you pull it off - and you will 26/36 of the time for a standard caster, or slightly better than 2/3 of the time - each unit suffers, on average, ''half'' a mortal wound (or, in other words, every nearby enemy unit will suffer 13/36 of a mortal wound, on average, or slightly better than 1/3).  That means a normal caster needs to be within range of ''five'' units for this to compete with Smite, and Yvraine needs to be within ''six''.  Stay the hell away from this power - you're seriously better off casting Smite additional times, even despite the casting penalty.
#'''Word of the Phoenix:''' WC 5, this ability no longer triggers Soulburst, but rather allows the targeted {{W40Kkeyword|Ynnari Infantry}} or {{W40Kkeyword|Ynnari Biker}} within 18" to heal 1d3 wounds ''or'' resurrect one model, who comes back to unit coherency with a single wound remaining. Accordingly, this is best used on as elite targets as possible (to maximize how many points you're returning to the table) with ''as few'' wounds as possible, both to maximize your chance to res rather than heal, and so that your res restores as high a percentage as possible of the target's total wounds.  For example, it'll repair Vypers at range just fine (since it doesn't care about the presence or absence of {{W40Kkeyword|Biker}}), but you'll get overall better performance on a Warlock Skyrunner Conclave.
#'''Unbind Souls''' A WC 6 debuff that allows units to re-roll wound rolls for melee attacks against the targeted unit. Now that Doom is more or less off the table for Ynnari units, this is the next best thing. It synergizes fairly well with the new Soulburst as it is relatively easy to cast without much hassle - and while it is easier to cast than Doom, the double nerf of shorter range AND being melee only really hurts.  
#'''Shield of Ynnead''' A slightly more challenging WC 7 power that grants ''all'' Ynnari units within 6" of the Psyker a 5++ invulnerability save. This works for literally everything in your army that doesn't already have a 5++ or better (e.g. this won't do anything to protect Wyches in melee) and can be a fantastic tool for your Wraith units, vehicles, or even the ever standard Aspect Warriors.
#'''Ancestor's Grace:''' This WC5 power allows the targeted friendly unit within 18" to re-roll hit rolls of 1 until your next Psychic phase, so both shooting and melee. A nice supplemental power, but it might be better to simply use an Autarch or Archon, who will benefit multiple units automatically with his aura (so long as you're using primarily <Craftworld> or <Kabal> Eldar in your Ynnari detachment).
#*As even your Craftworld Ynnari units can no longer benefit from Guide, this is the only option you have that can support your ranged units. Consider just parking an Autarch with a reaper launcher for your backline gunners in a Craftworld-focused list.
*Perhaps the two most worthwhile powers here are Word of the Phoenix and Shield of Ynnead; to give you a good example of them working together, if you supply a unit of Blaster Scourges with both, they go from a 4+/6++ to 4+/5++, and every time you bring a dead Blaster wielder back, you're bringing back 36 dead points.  Plus, they need Ancestor's Grace, since they're allergic to Archons.