Squirrel-bait

Whenever a Squirrel creature attacks you or
a planeswalker you control, you gain control
of that creature.
"...And thus did Corwinnn the Mighty succumb
to an early retirement. Treated to all the acorn's
he desired, and more, he passed on all he knew
to Crimson Fox, greatest of his kind."
-Chulane, Teller of Tales