Quote Originally Posted by Crowsfoot View Post
Advantages to upgrading a pet:

1) they deal more damage.

2) they gain a higher crit rate.

3) (THE BIGGEST DIFFERENCE) their passive evolves over time. At level 40, Samael gains a 10% chnce to terrify in his AA. He has no passive terrify component until this level. Same goes fir all pets, their passive evolves at level 40.
You mean that the level 40 upgrade only applies to Mythic and Arcane pets right? Legendary pets and below still only have passives that max out at lvl 15. Unless I missed a memo somewhere