Mobius and pet octopus
Member
I'm thinking he might because Mirror Entity procs when you kill a Mad Scientist with a Battlecry effect. Meaning the card isn't actually "played" until after its Battlecry resolves.
Yup that exact scenario got me wondering the same thing.
Also Kezan Mystic takes your secrets before she's actually played, right? I've never seen her snatch a secret that activates when a minion is played, so I don't know.
It's a common misunderstanding that minions enter the field after battlecry resolves. It's actually the opposite. Minions hit the field first, then battlecries resolve.
The reason mirror entity procs when fire elemental kills it is because deathrattles resolve before secrets are considered. So mad scientist dies, deathrattle resolves and pulls a secret in, and then the game checks for secrets activating.
A classic example of battlecries going off after minions hitting the field is the leeroy jenkins + knife juggler interaction. If your opponent has a knife juggler out, playing jenkins which summons the 2 1/1 dragonlings causes knife juggler to throw 2 knives. These 2 knives can hit leeroy because leeroy is on the field before the dragonlings are summoned.
Hearthstone science video on the subject: https://www.youtube.com/watch?v=Ln0BisR_SfY