It'd be funny to use it to copy Lazav, the Multifarious and then use the ability of that to copy another card.
And if one did that, wouldn't Embalmer's Tools work as well? So the Necrotic Ooze has the ability of Lazav to pay to become a creature in the graveyard but the Tools makes it X-1?
I'm probably going to dump Reclamation Sage, Gravecrawler and Kalitas, Traitor of Ghet for the Lich, Lazav and Ooze. Just a final question though: doesn't Taigam, Sidisi's Hand cancel out the Lich? Taigam says you "skip your draw step" and "put one into your hand", and the Lich says "If you would draw a card".