Creature - Wall 0/5, 1RR (3) Defender, reach (This creature can block creatures with flying.) Whenever Æther Membrane blocks a creature, return that creature to its owner's hand at end of combat.1
Illus. Zoltan Boros & Gabor Szikszai
The creature returns to its owner's hand at end of combat if it is still in play at that time, even if this card is not in play. [Planar Chaos FAQ 2006/12/13]