Having both Deathtouch and Lifelink is very strong regardless of the overall power level of the card. But Tomebound Lich has even more to offer.
It combines both the ETB and repeatable looting abilities, which instantly makes it a Limited bomb.
Of course, you can't play it in any deck due to the mana restriction, but Dimir and Grixis archetypes will have a ton of fun playing this looter.
Also, if this is your first pick, then you also know which colors to draft further on.