Lady Cyra d'Latith

Extort, Persist
When Lady Cyra d'Latith enters the battlefield, create a legendary black Equipment artifact token named Kotharoth. It has Equip {p/b}{p/b}{p/b} and "Equipped creature gets +3/+0 and has Deathtouch and Ingest." Attach Kotharoth to Cyra.
When Cyra leaves the battlefield, exile Kotharoth.