Creature — Human Soldier 1/1, 2U (3)
Common
Whenever Dream Fighter blocks or becomes blocked by a creature, Dream Fighter and that creature phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during his or her next untap step.)
Not only the sleeping should fear dreams.
Illus. Drew Tucker

10/4/2004: Dream Fighter affects all creatures that end up blocking it, including ones that are members of bands.
10/4/2004: If Dream Fighter is assigned to block a creature with Flanking, the Flanking ability and the Dream Fighter ability both trigger. The active player's Flanking effect is put on the stack first and resolves after the Dream Fighter's phasing out effect happen, so the Flanking does nothing.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander