My magic system works through runes. Each rune has a different effect and they need to be carved on different materials for different effects.
Let's focus on a curse named "I rot your life." For this curse I need human leather of a tormented soul, magic ink and very bad vibes. I already have the materials. Each rune only works once and becomes harmless after its use.
For this magic to work the victim needs to see the rune at very close range. Sadly the curse affects anyone who looks at it and is very complex to draw, so I can't close my eyes while working on it.
How can I use my black magic while minimizing the chance of cursing myself by accident?