Mordekaiser shines against tanky and melee bruiser compositions, utilizing his ultimate to isolate key targets for powerful 1v1 duels.
Due to his low mobility, he is vulnerable to slows and CC. Utilize Rylai's Crystal Scepter and his W shield to enhance engagement and survivability.
Riftmaker is a core item; consider Rylai's, Lich Bane (마공학판), and Sterak's Gage. He's currently strong after the Q AD scaling buff, but a nerf is likely.