If this card battles a monster, neither can be destroyed by that battle. You can only use each of the following effects of "Mirror Swordknight" once per turn. (Quick Effect): You can Tribute this card; Special Summon 1 monster from your Deck that mentions "Chimera Fusion", except "Mirror Swordknight". When a monster your opponent controls activates its effect, while you control "Chimera the Flying Mythical Beast" (Quick Effect): You can banish this card from your field or GY; negate that effect.
