Rahool is a vendor in Destiny 2 who provides players with a variety of services, including decrypting engrams and selling items. Leveling up Rahool is important because it allows players to access better rewards, such as more powerful gear and exclusive items.
There are a few different ways to level up Rahool quickly. One way is to simply play the game and complete activities. Every time you complete an activity, you will earn experience points (XP) that can be used to level up Rahool. You can also earn XP by decrypting engrams, as well as by purchasing items from Rahool.
