The Mourning Rail

Haste, Crew 4
The Mourning Rail's power is equal to the number of Spirits crewing it
When The Mourning Rail attacks, return X target creatures from your Graveyard to the battlefield crewing the Mourning Rail, where X is the number of spirits crewing the Mourning Rail . The creature becomes a 1/1 spirit in addition to its other types, and gains "If this creature would be put into a graveyard from anywhere, exile it instead"