Vandal's Delight

Gain control of target nonland nontoken permanent with mana value X or less. Put thief counters on it equal to X minus its
mana value. It gains "At the beginning of
your upkeep, remove a thief counter from
this permanent. Then if there are no thief counters on it, its owner gains control of it."

What's the fun in owning if you didn't take it?