If you decide to choose the Mid-Season Battle Pass, you can also retrospectively unlock any high-end rewards you earn based on the level you have earned. Fortnite Llama 100 Days Of School No Prob Llama Shirt! However, one of the advantages of buying early Battle Pass is the XP reward, rewarded for playing in general and playing in a party with friends. Since leveling up with XP to transform into Battle Stars, you’ll want to take the Battle Pass as soon as you can and take advantage of these rewards.