Common Soul

Select 1 face-up monster on the field to activate this card. Special Summon 1 "Neo-Spacian" monster from your hand to the same side of the field as the selected monster. The selected monster gains ATK equal to the ATK of the monster that was Special Summoned by this effect. When this card is removed from the field, return the monster that was Special Summoned by this card's effect to the hand.