The Rubberdex - #658 Greninja (Patreon)

 The mask changed his tongue first. Stretching it, lengthening it and rubberising it so that his cries for help were silenced.

Then, while he was distracted by his oversized appendage, the suit spread fast and stealthily, just like the mask was programmed to do.

It prided itself on being the mask that claimed its host the fastest, the quietest, and the sneakiest.

And as quickly as it had claimed its host, the Greninja slipped away and was gone.