Morty, Reluctant Sidekick

Whenever Morty becomes the target of a spell
or ability, create a 0/1 green Plant creature
token named 'Morty's Mind Blowers'.

Sacrifice a 'Morty's Mind Blowers': Counter target spell that targets Morty.

"Aww geez, I don't know if I'm ready to be a
Magic card, Rick!"