Collected 8 of these from VHE fragments dropped from Heroics or through the Trooper store, while the remaining 2 came from Assassin Mythicals.
Rewards given were:
From the Sacrifice:
Catalyst Soul x1
Skillshard x3
Colourless 5* Shard x5
Eternal Frontier Key Soul x4
Valentine's Heart x1
Heroic Legendary Soul x1
Epic Soul x6
Magus Epic Soul x3
Sentinel Epic Soul x12
Assassin Epic Soul x3
Legendary Soul x2
Rare Gunner Soul x5
Heroic Soul x5
Saint Talisman x3
Precious Soul x3
Explosive Fragments x6000
Cyborg Eddie Fragments x100
Heroic Mythical Soul Fragments x45
Sentinel Mythical Soul Fragments x525
Magus Mythical Soul Fragments x525
Assassin Mythical Soul Fragments x 100
Warrior Mythical Soul Fragments x 350
Gunner Mythical Soul Fragments x100
Ironite x75
Gold x300K
From the Vortexes:
Alchemist Soul Fragments x20
Skill Shard x2
Magus Soul x3
Legendary Soul x1
Heroic Soul x3
Legendary Soul x1
Sentinel Epic Soul x2
Heroic Mythical Soul Fragment x50
Talisman Soul Fragment x100
Legendary Soul x2
Alchemist Soul Fragments x15
Sentinel Epic Soul x2
Rare Soul x5
Legendary Soul x5
Rare Gun/Assassin Soul x2
Sentinel Soul x3
Heroic Soul x3
Magus Epic Soul x2
Sentinel Epic Soul x2
Talisman Soul Fragment x100
Legendary Soul x2
Alchemist Soul Fragments x15
Skill Shard x2
Sentinel Epic Soul x2
Epic Soul x2
Gunner Epic Soul x2
Sentinel Epic Soul x2
Talisman Soul Fragment x100
Legendary Soul x2
Gold x560K
Ironite x300
BTW: This also includes the rewards for the Feb 2020 Sacrifice event. Nothing was sacrificed before this, so the rewards from the sacrifice event challenges were:
Cyborg Eddie Fragments x100
Colourless 5* Shard x5
Valentine's Heart x1
Saint Talisman x3
Explosive Fragments x6000
Catalyst Soul x1