Elspeth, Untainted Oracle

0: Create a legendary 0/1 white Human creature token named Mansten with "This creature cannot be sacrificed."
-4: Create a colorless Equipment artifact token named Elspeth's Knife with equip {0} and "If the equipped creature's name is Mansten, it gets +0/+4."
: When a creature named Mansten leaves the battlefield, transform Elspeth, Untainted Oracle.