Unicorn and Joseph O'Brien head Theodorico (partly hidden) over a furlong out© Photo Healy Racing
Unicorn was heavily-supported when running green on debut at Galway last month but the son of Galileo showed that confidence wasn't misplaced as he justified prohibitive odds in the Irish Stallion Farms EBF (C & G) Maiden at Leopardstown.
The 4/11 favourite was sent to the front over a furlong out by Joseph O'Brien, and drew clear in the final 100 yards to beat Theodorico by nearly five lengths. Monocle was a further half-length back in third.
Aidan O'Brien said, "He was green, and you can see why he was so green at Galway. It took him a while to get going.
"He's still a baby and far from the finished article. There is a big engine there."
Paddy Power have introduced him at 33/1 for next year's Investec Derby.