“ What happens when, while in the middle of an important fight/Event, the mage that enchanted all your gear suddenly dies? Unless the enchantments outlive their source, you might not either.”
“ A known immortal traveling with the PCs kills an attacker, and is arrested and charged with murder, since immortals cannot kill in self defense, being immortal.”
“ A dark necromancer has discovered a way of making the magical energy cost of resurrection less than the energy he can gain by draining their life force. Given a sufficient supply of mind-drained minions, ultimate power beckons.”