Evolution is a key part of the game - as you collect experience points, your weapons will evolve and get more powerful. It's so satisfying to see your trusty old sword turn into a powerful magical staff! You'll also unlock new characters, each with their own unique abilities and playstyles.
The game also features randomized drops, so you'll never know what you're going to get. This keeps the game exciting and fresh, even after multiple playthroughs. You might get a crazy-powerful gun, or a useless item - it's all part of the thrill!
Vampire Survivors Weapon Evolution Guide Screen Rant - Alliancesecurity