event with ancient contracts (rusty coin in January)
All rusty coin gave us are normal transformation contracts. We only ever had the chance to fuse an ancient contract out of these. If I remember correctly, the only (not cash shop related) event thus far where we actually got a choosable ancient transformation was the Sakura Blossom event. Meanwhile though, people with too much cash or too much luck already have one or multiple legendary transformations suited for their main class.
maybe he meant the transform event with the coins. That also gave an ancient transformation