Tomb Scavenger

Collective Mass (As this creature enters the battlefield, you may sacrifice it to another Ooze
you control, if you do, add all abilities, power,
and toughness of the Ooze that was sacrificed
onto the Ooze that was sacrificed to)
When Tomb Scavenger enters the battlefield, if
you sacrificed it, draw a card and lose 1 life
Oozes feed off the remains from the last invasion