Mordekaiser

Strengths

Offense is your defense. Keep fighting to build up larger Indestructible shields.
Hitting multiple champions with the same ability can help quickly activate Darkness Rise.
Use Realm of Death on a low health enemy to guarantee the kill and keep their stats for the rest of a teamfight.

Passive · Darkness Rise — Mordekaiser gains a powerful damage aura and Move Speed after landing 3 attacks or spells against champions or monsters.
Q · Obliterate — Mordekaiser smashes the ground with his mace dealing damage to each enemy struck. Damage is increased when hitting a single enemy.
W · Indestructible — Mordekaiser stores damage he deals and takes to create a shield. He may consume the shield to heal.
E · Death's Grasp — Mordekaiser pulls all enemies in an area.
Ultimate · 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.

A suggested 5-lane lineup built around Mordekaiser, based on hero partnerships and role synergy — not win rate.