Can we stop the off-topic before a mod come?
Anyway, like others pointed out. Using Elf to mutate as a form of CC only works on a situational condition. Example: against dragons (which would likely kill you first anyway), against dangerous creatures (leaving you against a sturdy 5|5 Abom), while risk giving your opponent a strong mutant with something like Steal or Destroy. In fact, this is exactly why Mutation are more often than not used to your own creature (a mutation fodder). Sure, you can kill the creature around 10% of the time, but it's too small of a percentage as CC and a reasonable risk to take when using Mutation on your creature.
Now, what's your mutation fodder? 4|4 Cocks? Mutated to gain +1|+1? Not worth it. You get a powerful mutant? Good luck powering their skill if it's not a
/
mutant.
Then again, you've been proven hostile towards feedback, so i don't think any feedback is actually necessary...