I out of sudden decided to make a topic about this to spark some possibility of new and fun weapons to play with.
Bucket O' Blocks
A bright red Bucket full of blocks,it's purpose is to throw some random colored blocks infront of you for protection against enemy fire, you can make 3 piles of blocks before the bucket gets empty.
Radioactive Thrower (don't mind the screenshot, it's just for design ideas)
A radioactive weapon that "melts" (by melting I mean fake kill) blocks or enemies infront of you, it's like a flamethrower, but radioactive, you can make a hole on the wall to pass through, but since it's fake kill, the blocks will respawn shortly after, and it can infect the floor for a short period of time, touching it will instantly kill the player.
I had other ideas in mind, I'll keep updating this once I figure out something cool, feel free to suggest as well.