Breakdown
Each 2019 Gold Sarcophagus Tin contains the following:

Three 16-card Mega Packs. Each Mega Pack contains cards from Flames of Destruction, Dark Saviors, Cybernetic Horizon and Soul Fusion:
1 Prismatic Secret Rare
1 Ultra Rare
1 Super Rare
1 Rare
12 Commons
5 Promotional Prismatic Secret Rare variant cards:
2 of 6 new cards with art by Kazuki Takahashi
2 of 5 cards from the original Yu-Gi-Oh! animated series
1 of 3 new World Premiere cards