Trundle DOES NOT COUNTER YORICK. His passive gives him 2~6% HP per minion. that's around 30~ 60 HP per wave, or every 30 seconds. At level nine, his passive will be at around 4%. Melee minions will have aounnd 500 hp and Caster minions will have around 280+15*3 = 325 HP. This means he will heal roughly 500*0.04 + 325 * 0.04 = 20 + 14 = 34 HP EVERY 30 SECONDS.
Yorick's omen of damage heals 40% per DAMAGE DONE, which is roughly 200 (+1 per bonus attack damage) EVERY TEN TO SIX SECONDS.This means that Yorick is dealing 200 damage and healing 80 hp every 6 seconds at level nine, or dealing 1000 damage and healing 400 every thirty seconds.More with passive health regen, or cdr.
But Yorick has mana problems.
Yorick regens 6.5+(0.45) Mana per 5 and has max mana 265(+35) . At level 9 he will have a baseof 10.55 mana regen per 5and 580 max mana. With tear he gets +350 Max mana and +7 mana regen per 5, and gives him +4 max mana per cast.
Yorick's red ghoul only costs 75 mana to cast.
This is without taking into account runes or masteries.In comparison, Nasus's soul siphon ability is just 14% lifesteal.
IN ORDER FOR NASUS TO REGEN 400 HP IN 30 SECONDS, HE WOULD HAVE TO DEAL 2857 DAMAGE, WHICH IS CLEARLY RIDICULOUS.
But yorick has a bad late game!
WHO KEEP SPREADING THIS PACK OF LIES?Yorick has a passive 0~20% bonus damage AND damage reduction. He has AOE slow, a long lasting speed buff to chase down runners, AND CAN ULT HIS CARRY FOR 75% OF HIS CARRY'S DAMAGE, CRITS INCLUDED.Nasus and trundle do not counter yorick, pick mordekaiser, swain, or cho'gath.