There's a memory component here, but it's no harder to track than, say, the Day/Night cycle while there are no Daybound or Nightbound creatures in play
Below you'll find all of the cards in the 'Crimson Blaze Museum 2' Secret Mission: Mega Venusaur ex #83 (Rainbow / Two Gold Star) Mega Blastoise ex #84 (Rainbow / Two Gold Star) Mega Lopunny ex #85 (Rainbow / Two Gold Star) Mega Steelix ex #86 (Rainbow / Two Gold Star) Rewards: 36 Wonder Hourglasses, 12 Pack Hourglasses and 10 Shop Tickets
Check out this Game Knights video where Muldrotha cleans house in the Brawl format
That is a good thing if you have an insect-based card to start off with
As for Vivis second effect, you may rest Vivi to give one of the opponents Characters a -2,000 Power reduction, and you can give the Rush keyword to a Character that doesnt have the When Attacking effect
5D's anime and manga), Paradox, Kalin Kessler, Misty Tredwell, Kite Tenjo ( ZEXAL manga and ARC-V anime), Cologne, Yuya Sakaki ( ARC-V anime and manga), Declan Akaba ( Yu-Gi-Oh