It would be AMAZING to have a new sigil that takes away bad potion effects (like wither, poison, blindness, etc.) while it is on. This would hopefully be much like the Thaumic Tinkers' Talisman of Remedium. Please also allow this sigil to be added to the Blood Armour.

Don't think I'd want to do that, since it would defeat the purpose of bad potion effects from potions. Maybe as a potion effect in itself, but not as a sigil.