It’s a Secret to Everybody

Although they could both control a target by transforming them into an animal, Polymorph restored the target's HP over time, while the Poultryizer didn't.

This was why so many Mages disliked the skill. Once their opponent was on critical HP, Polymorph became useless because it would heal them.

Additionally, Polymorph could only be casted on Humanoid targets, while the Poultryizer could be used on a variety of races and targets including Humans, Beasts, Undead, Demons and even certain Bosses.

Lu Li looked forward to killing some Bosses with this contraption.

If he could interrupt a Boss from channeling its ultimate skill with the Poultryizer, it would basically become a toothless tiger.

Poultryizer was also instant cast, whereas Polymorph had a cast-time of 1.5 seconds.