Olivia makes treasures whenever one or more players land a hit on a player, and can then use those treasures to buff your board, while Ezio can cast assassins for a fraction of their usual cost, provided you land a hit with another assassin first
Each pack comes with an assortment of cards, most of which are fixed inclusions
You can obtain the Mega Scizor ex (4-Diamonds rarity) card by opening Mega Shine from Mega Shine set
Both duelists have Dark Magicians sent to the graveyard and revived throughout the duel, but eventually Yugi defeats Arkanas Dark Magician using the effect of his Dark Magician Girl, which gains a 600 attack point boost as both duelists have a Dark Magician in the graveyard at the time
I also find it's helpful to make your own checkboxes to keep track of effects that last multiple rounds
The first GX and full art card for Shuckle