Crystal Aegis (SDCB-EN017) [Structure Deck: Legend of the Crystal Beasts]

Target 1 "Crystal Beast" Monster Card you control; destroy it, then Special Summon 1 "Crystal Beast Token" with the destroyed monster's original Type, Attribute, Level, and ATK/DEF. If a "Crystal Beast" card(s) is placed in your Spell & Trap Zone while this card is in your GY, even during the Damage Step: You can banish this card; Special Summon 1 "Crystal Beast" Monster Card from your Spell & Trap Zone. You can only use this effect of "Crystal Aegis" once per turn.