Hi, It's just a normal daily dropping alicorn. You'll get 4-12 with a chance of something higher, like 50 or 100, but that's really rare. (they're 22 hours too )
In the Inventory guide, I've written 2 entries for alicorns - 1 under A for alicorns and then individual entries for each specific alicorn as some of them also drop other items. Hope that helps!