Discussion about Sylvan (Wood Elves).

It will be very difficult for an Elf to clear 50 vampires (plus skeletons, zombies, and spirits) on the 2nd week. Unless you have Ossir in your tower or as your main hero. According to rough estimates, on the 2nd week, his army will be (excluding dwellings): around 30-40 Fey, 20-30 Dancers, 25 Archers, 8 Druids, and 3 uniques. You can definitely defeat these 50 vampires, considering that he starts with Luck and it levels up quickly from the beginning. If there are 3rd-level dwellings on the map, then in principle, you can defeat 50 vampires with another hero as well.