A percent of the damage dealt from abilities is converted into a temporary shield, absorbing incoming damage.
Q - Mace of Spades
Mordekaiser's next three attacks deal escalating bonus damage.
W - Harvesters of Sorrow
Coats an ally in magnetic metal, increasing each unit's movement speed toward one another. While near one another, the metal swirls violently dealing damage per second to enemies.
E - Siphon of Destruction
Mordekaiser deals damage to enemies in a cone in front of him. For each unit hit, Mordekaiser's shield absorbs energy.
R - Children of the Grave
Mordekaiser curses an enemy champion or the Dragon, stealing a percent of their life initially and each second. If the target dies while the spell is active, their soul is enslaved and will follow Mordekaiser as a ghost.