If you unequip a knight / ghost right after dying, you will die again and you won’t be able to respawn.
I found this when I was testing the spikeboard to see if it could be useful on a ball race course I am building on Smooth Dirt
- Place a spikeboard from DIY
- Equip the Knight / Ghost milestone
- Walk into the spikeboard and die
- Unequip the Knight / Ghost
Being able to respawn after dying
Not being able to respawn after you unequip the Knight (Check video)