Freljord
8 champions. Freljord Star Crystals, Nova Crystals and Gemstones upgrade the constellations of 6 of them.
Gold ring = upgrades with Freljord crystals and Gemstones.
Freljord Star Crystals adventures ≈ 59 · each champion needs 50
- 3★
The Collector of Souls 3★ World #8 · clear with a Noxus champion 
Silver Star Vessel - 3.5★
The Colossus 3.5★ World #6 · clear with a Demacia champion Silver Star Vessel - 3.5★ The Ancient Fear 3.5★ World #6 · clear with a Targon champion
Gold Star Vessel - 3.5★
The Grand Heist 3.5★ World #6 · clear with a Targon champion Gold Star Vessel - 5★ The Frost Witch 5★ World #13 · clear with a Piltover & Zaun champion Gold Star Vessel
- 10★
With Friends Like These... 10★ Nightmare #32 · clear with a new champion Gold Star Vessel
Legend Levels 66 and 89 also give a Freljord Gold Star Vessel. All Legend Level rewards.
Freljord Nova adventures ≈ 2.5 · each champion needs 1
- 10★ With Friends Like These... 10★ Nightmare #12 · clear with a new champion 1 Nova Crystal
- 10★ With Friends Like These... 10★ Nightmare #33 · clear with a new champion
50 Nova Shards
Freljord Gemstones adventures ≈ 350 · each champion needs 1000
- 10★ With Friends Like These... 10★ Nightmare #46 · clear with a new champion
Major Gemstone Vessel - 10★ With Friends Like These... 10★ Nightmare #57 · clear with a new champion 100 Gemstones
Gemstone Vessels also come from the Glory Store (pick Freljord), the Emporium and Legend Level 74; regional Gold Star Vessels from the Glory Store and Legend Levels. All sources.
Rewards your Freljord champions can claim
Adventure rewards that need a Freljord champion to clear the adventure.
- 2★ The Spear of Vengeance 2★ Blossom #3 · clear with a Freljord champion 10 Star Crystals
- 2.5★
The Sheriff of Piltover 2.5★ Teamfight #2 · clear with a Freljord champion 
Silver Vault - 3★ Daughter of the Void 3★ World #8 · clear with a Freljord champion Silver Star Vessel
- 3★ The Collector of Souls 3★ World #3 · clear with a Freljord champion
Gold Vault - 3★ The Dragonsire 3★ World #7 · clear with a Freljord champion
15 Wild Fragments - 3.5★ The Ancient Fear 3.5★ World #4 · clear with a Freljord champion Gold Star Vessel
- 3.5★ The Grand Heist 3.5★ World #4 · clear with a Freljord champion Gold Star Vessel
- 3.5★ Scorn of the Moon 3.5★ Rogues #4 · clear with a Freljord champion Gold Vault
- 4★ The Star Forger 4★ World #8 · clear with a Freljord champion Silver Star Vessel
- 4★ The Starry-Eyed Songstress 4★ Blossom #7 · clear with a Freljord champion 20 Star Crystals
- 5★ The Frost Witch 5★ World #9 · clear with a Freljord champion Gold Star Vessel
- 5.5★
The Enlightened One 5.5★ Arcane #5 · clear with a Freljord champion Gold Vault - 6★ The Dragonsire 6★ Titans #3 · clear with a Freljord champion Gold Vault
- 6★ The Dragonsire 6★ Titans #4 · clear with a Freljord champion Gold Vault
- 6★ Blossoms and Mushrooms 6★ Blossom #4 · clear with a Freljord champion 50 Nova Shards
- 6.5★ Scourge of the Pit 6.5★ Teamfight #4 · clear with a Freljord champion Gold Vault