Chester the Mimic
Dm: You try to open the chest when all of a sudden it bites your hand.
Me: I wanna tame it.
Dm: What?
Me: I wanna tame the thing.
Dm: The only way you’re gonna tame it is if you roll a nat 20
*Rolls a nat 20*
Dm: …
Me: So… I’m naming it Chester.
The entire party then proceeds to ride the chest and this thing got all of the xp and the dm stopped using what were basically weeping angels because Chester could kill these things almost instantly due to his lack of eyes.