Hey,
Mordekaiser's W, the spell that he maxes in the top lane (at least), heals him if it hits enemies. The heal goes from 50 to 190 (+30% AP) (from lvl 1 to 5) if it hits one enemy, and 100 to 380 (+60% AP) for two or more enemies. This value is divided by 4 against minions.
Against minions only.
ALL other units give him the full heal. These other units are:
- Champions
- Jungle monsters
- Pets (Tibbers, Yorick's ultimate, Shaco's clone, Wukong's decoy, Leblanc's Mirror Images, Mordekaiser ghosts)
- Summoned creatures. These include Yorick's ghouls, and yes, also Malzahar's Voidlings, Zyra's plants, Void Gates' Voidspawns, Shaco's boxes, everything.
So yes, Mordekaiser heavily counters Yorick. It's obviously not enjoyable, just like it's not enjoyable to face a Cassiopeia as Gangplank. It's a hard counter like many others exist in the game, and... You know, it's not that bad. I suppose you never had this match-up (the odds of having it in a matchmade games are really low), but the old Yorick was even easier to stomp as Mordekaiser, because he was relying on poking with E and W. Which Mordekaiser didn't have a care about.
Additionally, Mordekaiser's shield generation is also halved against minions and minions exclusively - hence not against Yorick's ghouls.
And yes, I know how huge Mordekaiser's heal can be, and that was without a full AP stuff and without ANY heal amplification item.
