Atium Shadow

Haste
When Atium Shadow enters the battlefild, it becomes a copy of target creature you control
Whenever a creature enters the battlefield, Atium Shadow becomes a copy of that creature.
When Atuim Shadow copies a creature, it keeps it's abilities, and is an Illusion in addition to it's other types.
Whenever Atium Shadow becomes the target of a spell, sacrifice it. When it attacks or blocks, sacrifice it at the end of that turn.