Was wondering what happens if you are fighting a spellcasting mob and sing
the teleport song? For example, an ogre shaman is standing in front of you
and starts casting a spell. As soon as you see the text message that he has
started casting the spell, you start singing the teleport song and
successfully teleport before he finishes casting the spell. The teleport
could move you behind the shaman (no longer in his line of sight) or move
you further away out of the range of the spell. Would you still get
affected by the spell? If not, would the shaman lose the mana?

Galtin of E'ci