In a way that's very much like the story of the Trojan Horse, the gift you give your opponent appears to have one of your creatures inside of it and it attacks the enemy because it still works for you
According to the developers on-stage, they were designed to feel like the " ultimate prize ": according to the team, they look and feel like real gold
We posted the first information about the set in August and then the first cards were officially teased at Worlds a few weeks later, including English versions of Mega Dragonite ex and the above Mega Attack rares
Sometimes you'll trigger it, sometimes your opponent will trigger it
It isnt down-to-the-card accurate (more on this in a sec) but it is a really good ballpark
When it comes into play, you get to make two 1/1 Faerie Rogue creatures with flying, which is not bad, but not great given its cost