Posthumous Promotion

Return target creature card from your graveyard
to the battlefield. Put an authority counter on it.
(Creatures with authority counters on them can't be
blocked except by creatures with power greater than
the number of authority counters on them.)
"You, Corpsey. You're my new bodyguard, got it?
Now get me out of here!"
—Maggie Dephellia, rogue neophyte