Hugo, Partner in Grime

Partner with Seth, Mischievous Rascal (When
this card enters the battlefield, target player may put
Seth into their hand from their library, then shuffle.)

Whenever you draw a card, put a +1/+1 counter
on Hugo, Partner in Grime.
When Hugo, Partner in Grime leaves the battlefield, draw a card for each +1/+1 counter
on it.