Boyfriend, Master Bard

As long as you have Girlfriend, Demon
Half-Blood, on the battlefield, Boyfriend,
Master Bard gets +4/+4.
Partner with Girlfriend, Demon Half-Blood
(when this creature enters the battlefield, target player
may put Girlfriend, Demon Half-Blood into their
hand from their library, then shuffle.)
"Beep Skedop Deedlee Daa"