Opabinia

Opabinia enters the battlefield with one Snab
counter on it.
{t}: Move a Snab counter from Opabinia to
another target permanent and gain control of it
for as long as that permanent has a Snab counter
on it.
{t}: Move a Snab counter from target permanent
you control to Opabinia.
"Mess with the 'pab, you get the Snab!"