Set 3 mid-set update was added to the public beta alongside the V10.12 content for League of Legends. Titled Galaxies: Return to the Stars, set 3 mid-set update features a collection of champions, origins and classes themed around the and themes from the League of Legends skin Multiverse.
| Blademasters' basic attack have a chance to trigger 2 additional attacks against their target. These additional attacks deal damage like basic attacks, trigger on-hit and on-attack.|
| Every fourth attacks from Blaster fire additional shots at random enemies. These shots deal damage like basic attacks, apply on-hit effects and can critically strike.|
| Brawlers gain additional maximum health.|
|While at least 2 Demolitionists are in play, all Demolitionist's spells stun for 1.5 seconds, once per spell cast.|
| Infiltrators gain bonus attack speed for 6 seconds at the start of combat, refreshed on takedown.|
|While at least 2 Mana-Reaver are in play, Mana-Reaver's attacks increase the cost of their target's next spell cast by 40%.|
| While a Mercenary is in play or on the Bench, players will have the opportunity to access the 8 Spell Upgrades pool of their Mercenary, each upgrades only appears once purchased.|
Each Mercenary type can be upgraded up to 3 times.
Selling Mercenarys does not revert to Spell Upgrades later.
| All allies gain bonus magic resistance.|
|Ally true damage while all other ally basic attacks are converted to magic damage.basic attacks are converted to|
| Protectors gain a shield based on their health for 4 seconds whenever they cast a spell. The shield doesn't stack.|
| Snipers deal increased damage for each hex of distance between themselves and their target.|
| All allies gain spell power.|
|Starships gain 40 mana per second, continuously maneuver around the board, and are immune to movement impairing effects, but can't basic attack.|
| Vanguards gain bonus armor.|
|While at least 3 Astros are in play, reduce your Astro units' mana costs by 30.|
| Upon dealing or taking 10 instances of damage, Battlecast units heal if below 50% health, or deal magic damage to the nearest enemy if above 50% health.|
| All allies heal based on damage dealt with spells and attacks.|
| All allies gain 15% bonus attack speed at the start of combat and then every few seconds.|
| Cybernetics with at least one item gain bonus health and bonus attack damage.|
| When an ally unit dies, all Dark Star units gain bonus attack damage and spell power.|
|While at least 3 Mech-Pilots are in play, at the start of combat, three random Mech-Pilots are merged into a Super-Mech until it dies. The Super-Mech has the Traits of its Pilots, as well as 3 random items from among them. When the Super-Mech dies the Pilots are ejected with 35% health and they continue to fight.|
| At the start of combat, Rebels gain a shield and bonus damage for each adjacent Rebel. The shield lasts for 8 seconds. The shield does not scale with spell power.|
|Whenever a Space Pirate lands a killing blow on a champion there is a chance to drop extra loot.|
| Whenever a Star Guardian casts a spell, an amount of mana is evenly distributed among all other Star Guardians.|
List of champions
Set 3 Trivia
- Most champions have one Origin and one Class, with a few exceptions:
- and have two classes.
- All champions within Set 3.5 can be seen wearing a skin.