最終決戦 狂三 is a Weiß Schwarz card from デート・ア・ライブ Vol.3 DAL/W131-045. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When this is placed on stage from hand, if you have 2 or more other 《Date》 or 《Celestial Spirit》 characters, you may draw 1 card. If you do, discard 1 card. 【ACT】 BRAINSTORM (1) Flip over the top 4 cards of your deck, then send them to Waiting Room. For each CX among them, resolve the following effect, "Search your deck for up to 1 《Date》 or 《Celestial Spirit》 character, show it to your opponent, add it to hand, discard 1 card, and shuffle your deck afterwards."
This card was printed in Japanese only; the English text above is an unofficial community translation.