Some kind of door shield that closes when holding right click and is otherwise open.

Ideally when you let go of right click it should try to reflect projectiles within a short distance, like a form of parry by opening the door at the right time.

Should be less annoying than vanilla shields, probably going on a cooldown when hit by any attack that isn't parried.

Also ideally just don't make it require durability, it'd be more fun without it.

The cooldown on hit should be longer than it takes for a skeleton to shoot you, so you can only block every second arrow unless your parries are on point.

i'd like to do this

Might be in a theoretical addon mod.