Unsettling Warning, Illyasviel

【CONT】 During your opponent's turn, your other character in the middle position of your center stage gets +1500 power.【AUTO】 [(1)] When this card is placed on the stage from your hand, you may pay the cost. If you do, search your deck for up to 1 "Mad Warrior's Howl, Berserker", put it on any position on your stage, and shuffle your deck.