Every few seconds, Galio's next basic attack deals bonus magic damage in an area. Galio gains attack speed when Colossal Smash is up. When an ability hits an epic monster or enemy champion, it reduces the cooldown of Colossal Smash by 3 seconds. This effect can only be triggered once per cast.
1
WINDS OF WAR
Galio fires two windblasts that converge into a large tornado that deals damage over time.
2
SHIELD OF DURAND
Galio charges a defensive stance, moving slowly. Upon releasing the charge, Galio will taunt and damage nearby enemy champions.
3
JUSTICE PUNCH
Galio will briefly step back and charge, damaging and knocking up the first enemy champion he encounters.
Ult
HERO'S ENTRANCE
Galio designates an ally's position as his landing spot, granting all allies in the area a magic shield. After a delay Galio smashes down location, knocking up nearby enemies.
Ability descriptions from the official Wild Rift website.
This page is for League of Legends: Wild Rift (the mobile game), not League of Legends on PC. A Japanese version with guides and matchup notes is available: 日本語版.