In Season 3, heroes pulled from Valhalla Summon belong to one of the Nine Realms, each benefitting them with a buff to allies or an aliment to enemies if multiple heroes from the same realm are placed in a team.
Alfheim[]
All allies are healed by 2/4/7% when an Alfheim Hero reaches low health.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Kvasir (Holy) | Frigg (Nature) | |
| Grevle (Nature) | Ratatoskr (Nature) |
Asgard[]
All allies gain 10/15/20% mana when an Asgard Hero dies.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Agnes (Holy) | Gullinbursti (Holy) | Heimdall (Nature) |
Helheim[]
Deals 25/50/100% damage to all enemies when a Helheim Hero dies.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Stonecleave (Dark) | Lady Loki (Fire) | |
| Shadereave (Fire) | Tyr (Fire) |
Jotunheim[]
All allies get an Ice Giant minion with 6/10/14% HP and 10/12/16% attack inherited from the caster when a Jotunheim hero dies.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Nordri (Ice) | Jott (Ice) | Skadi (Ice) |
| Lord Loki (Ice) |
Midgard[]
All allies get +5/+10/+15% attack for as long as a Midgard ally has low health. This effect cannot be dispelled.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Bjorn (Dark) | Brynhild (Nature) | Sif (Holy) |
| Mist (Holy) | Odin (Holy) | |
| Thor (Holy) |
Muspelheim[]
All enemies receive 22/37/64 Burn damage for as long as a Muspelheim ally has low health. This effect can't be cleansed.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Sudri (Fire) | Sumle (Fire) | Baldur (Fire) |
| Gefjon (Fire) |
Niflheim[]
All enemies have -5/-10/-15% accuracy for as long as a Niflheim ally has low health. Chance to miss also applies to offensive Special Skills. This effect can't be cleansed.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| By-Ulf (Nature) | Fenrir (Ice) | |
| Ei-Dunn (Fire) | Salmon Loki (Dark) | |
| An-Windr (Dark) |
Svartalfheim[]
All enemies received 22/37/64 Poison damage for as long as a Svartalfheim ally has low health. This effect can't be cleansed.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Jarvur (Ice) | Fura (Dark) | Alfrike (Dark) |
| Almur (Nature) |
Vanaheim[]
The mana of all enemies is reduced by -5/-10/-15% when a Vanaheim Hero dies.
| 3* Heroes | 4* Heroes | 5* Heroes |
|---|---|---|
| Mireweave (Ice) | Freya (Dark) | |
| Norns (Holy) | ||
| Bera (Dark) |
Nidavellir[]
This group of heroes belongs to Untold Tales II - Treasures of Flame and Frost, a continuation of Season 3, Valhalla. Unlike other seasons where heroes belong to family groups, the Valhalla heroes are segmented by realms. There are 9 realms in the original Season 3 and for this "mini season" a new realm, Nidavellir, has been added. All heroes so far have been members of this realm but that may not hold true as the season goes on.
Nidavellir
Realms empower their members in unique ways. The more unique members of the same realm there are in the team, the more powerful the realm effects.
The Molten Core is charged each time a character receives damage from normal attacks or Special Skills.
| Rarity |  Holy |
 Nature |
 Ice |
 Fire |
 Dark
|
|---|---|---|---|---|---|
| 5* | Gandr | Ott | Andvari | Regin | Dularfulr |
| Hreidmarr | |||||
| 4* | Fjalar | ||||
| 3* | Helgi |