Mordekaiser gains a powerful damage aura and Move Speed after landing 3 attacks or spells against champions or monsters.
1
OBLITERATE
Mordekaiser smashes the ground with his mace dealing damage to each enemy struck. Damage is increased when hitting a single enemy.
2
INDESTRUCTIBLE
Mordekaiser stores damage he deals and takes to create a shield. He may consume the shield to heal.
3
DEATH'S GRASP
Mordekaiser pulls all enemies in an area.
Ult
REALM OF DEATH
Mordekaiser drags his victim to a different dimension with him and steals a portion of their stats. If he kills them, he keeps the stats until the victim respawns.
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.