Calling Jewel Knight, Christine

:[ 1 & Choose a grade 3 card from your hand, and reveal it] When this unit is placed on , if you have three or more other rear-guards with "Jewel Knight" in its card name, you may pay the cost. If you do, search your deck for up to one grade 3 card with "Jewel Knight" in its card name, call it to , shuffle your deck, and at the end of that turn, put the card called with this effect into your hand, choose a card from your hand, and discard it.