Melancholy Flutist

Whenever a Song enters the battlefield under
your control or you compose, put a verse counter
on Melancholy Flutist. Then target player mills
X cards, where X is the number of verse counters
on Melancholy Flutist.
{3}{u/b}, Sacrifice Melancholy Flutist: Return any
number of nonland cards from your graveyard to
your hand with total converted mana cost less
than or equal to the number of verse counters
on Melancholy Flutist