While playtesting kyrub's 'insecticide' patch, we found an amusing bug. The Invulnerability spell is impossible to dispel! It's the last on the list of spells,

While playtesting kyrub's 'insecticide' patch, we found an amusing bug. The Invulnerability spell is impossible to dispel! It's the last on the list of spells, and suffers from the off-by-one bug. This is why Guardian Spirit + Invulnerability starting strategy is so popular. The invulnerability is literally impossible to dispel without the player-made patch!