Is it possible to make something de-spawn after it's spawned? I have this cool idea to make the nova, pen & ink, and colorblind filters; then have nova and pen & ink despawn to leave colorblind, sort as if your eyes have been damaged in-game, but I can't quite figure out how to make something despawn after it spawns...
Nope. The only way to do it is for items that can be destroyed, and you'd have to set them to never respawn. It'd be great if we could set un-spawn times, but unfortunately Forge doesn't offer that advantage.