The Lich's Army

Indestructible, can't be countered, enters the battlefield tapped, only {b} can be spent on {x}.

You may have The Lich's Army gain the abilities,
power, and toughness of any black creature with converted mana cost {x}.

At the beginning of your end step, if you control this
and The Lich's Tomb, The Lich's Tome, and The
Lich's Infamy, then exile them and meld them into
The Lich Eternal, Death Made Manifest.