When a "Raidraptor" monster you control battles, during damage calculation (in either player's turn): You can Special Summon this card from your hand, then gain 100 LP for each Spell/Trap Card you control and in your Graveyard. You can Tribute this card; your opponent takes no battle damage for the rest of this turn, also Special Summon 1 "Raidraptor" Xyz Monster from your Extra Deck in Defense Position, but its effects are negated and it is returned to the Extra Deck during the End Phase. You can only use this effect of "Raidraptor - Last Strix" once per turn.