Umbral Souls

Umbral Souls grant varying Buffs depending on the kind of Skeletal Minion being replaced, as follows -

Umbral Souls from:

Skeletal WarriorSkeletal WarriorMinion, Persistent, Physical
Level: (1-20)
Reservation: (60-20) SpiritActivate to summon Reviving Skeletal Warriors.First 2 minions summoned have no base spirit reservation

Additional Effects From 1-20% Quality:
Minions have (1-20)% more Maximum LifeSkills can be managed in the Skills Panel.s grant 15% increased Attack Damage.
Skeletal SniperSkeletal SniperMinion, Persistent, Physical, Fire, Chaos
Tier: 1
Level: (1-20)
Reservation: (90-30) SpiritActivate to summon long-ranged, Reviving Skeletal Snipers that can fire a gas arrow on Command.
Additional Effects From 1-20% Quality:
Minions deal (1-20)% more DamageSkills can be managed in the Skills Panel.s grant 15% increased Projectile Speed.
Skeletal ClericSkeletal ClericMinion, Persistent
Tier: 13
Level: (1-20)
Reservation: (60-20) SpiritActivate to summon Reviving Skeletal Clerics that heal other minions and revive fallen Skeletons.
Additional Effects From 1-20% Quality:
Revived Skeletons are immune to Damage for (0.15-3) seconds after being RevivedSkills can be managed in the Skills Panel.s grant 30% increased Energy Shield Recharge Rate.
Skeletal ArsonistSkeletal ArsonistMinion, Persistent, Fire, Detonator
Tier: 3
Level: (1-20)
Reservation: (90-39) SpiritActivate to summon bomb-throwing, Reviving Skeletal Arsonists that can detonate other Minions on Command.Command: Explosive Demise
Cooldown Time: 3.00 sec
Attack Damage: 300% of base
Detonate an allied Minion whose current Life is below a threshold, dealing heavy Attack damage to nearby enemies.
Converts 100% of Physical Damage to Fire Damage
Deals additional Fire Damage equal to 8% of Minion's maximum Life
Can target Minions with (30–1096) Life or less
Explosion radius is 2.4 metres

Additional Effects From 1-20% Quality:
Deals additional Fire Damage equal to +(0.2–4)% of Minion's maximum LifeSkills can be managed in the Skills Panel.s grant 15% increased Area of Effect.
Skeletal Storm MageSkeletal Storm MageMinion, Persistent, Lightning
Tier: 11
Level: (1-20)
Reservation: (120-39) SpiritActivate to summon Reviving Skeletal Storm Mages that can call down a lightning storm on dead Skeletons on Command.Command: Death Storm
Cooldown Time: 5.00 sec
Cast Time: 2.00 sec
Critical Hit Chance: 10.00%
Lightning bolts strike all fallen Skeletons in the area, creating Shocked Ground around them.
Deals 10 to 59 Lightning Damage
Bolt explosion radius is 2 metres
Shocked Ground radius is 2 metres
Shocked Ground duration is 6 seconds

Additional Effects From 1-20% Quality:
Minions gain (1-20)% of their maximum Life as Extra maximum Energy ShieldSkills can be managed in the Skills Panel.s grant 25% increased Spell Damage.
Skeletal Frost MageSkeletal Frost MageMinion, Persistent, Cold
Tier: 5
Level: (1-20)
Reservation: (120-39) SpiritActivate to summon Reviving Skeletal Frost Mages that can envelop your Minions in an icy shield on Command.Command: Ice Armour
Cooldown Time: 12.00 sec
Command a Skeletal Frost Mage to target a location or Minion and apply Ice Armour to Minions in an area, reducing damage taken from Hits, causing damage to enemies that Hit them, and counting as Frozen for other effects.
Ice Armour radious is 4 meters
Ice Armour duration is 6 seconds
Ice Armour grants 40% reduced damage taken from Hits
Ice Armour deals (x-x) to (y-y) Cold damage to enemies

Additional Effects From 1-20% Quality:
Minions deal (1-20)% more DamageSkills can be managed in the Skills Panel.s grant 35% increased maximum Energy Shield.
Skeletal BruteSkeletal BruteMinion, Persistent, Physical, Payoff
Tier: 13
Level: (1-20)
Reservation: (165-48) SpiritActivate to summon hard-hitting, Reviving Skeletal Brutes that can Stun Primed enemies and Warcry on Command. This Warcry Intimidates nearby enemies and Consumes Freeze on enemies and allies to deal damage in an Area around them.
Additional Effects From 1-20% Quality:
Minions cause (2-40)% more Stun buildupSkills can be managed in the Skills Panel.s grant 60% increased Stun buildup.
Skeletal ReaverSkeletal ReaverMinion, Persistent, Physical
Tier: 9
Level: (1-20)
Reservation: (90-30) SpiritActivate to summon aggressive, Reviving Skeletal Reavers that can enrage on Command.
Additional Effects From 1-20% Quality:
Minions have (1-20)% increased effect of RageSkills can be managed in the Skills Panel.s grant 6% increased Skill Speed.