Today I made my own custom block class in Fabric. It has multiple features, where I overrided the vanilla Minecraft methods that my block class extended. For example, I overrided onProjectileHit, and made it explode when an arrow hit it! I also overrided onPlace, so that it creates a cool sound effect every time its placed. One more thing I did was override animateTick, which allowed for me to create particle effects for the block to emit.