Kagemusha of the Six Samurai (AP01-EN006) - Astral Pack 1 Unlimited

During either player's turn, when exactly 1 face-up "Six Samurai" monster you control is targeted by a Spell Card, Trap Card, or card effect that could have targeted this card: You can activate this effect; that Spell/Trap/effect now targets this face-up card on the field, instead.