Dessert Nomad
Adventurer
I agree with this. It can be very frustrating when you cast sanctuary on yourself and the dm makes the ankheg attack someone else because ‘you have sanctuary and it can’t hit you’.
Why is it frustrating if sanctuary works exactly like the spell description says? If an opponent tries to attack you, they have to make a save, and if they fail the spell forces them to pick a different target or waste their attack. I don't understand why you'd be frustrated if you cast a spell that forces the enemy to save or pick a different target, and the enemy goes ahead and picks a different target - the DM is effectively saying 'your spell worked so well the enemy doesn't get a save' which seems like a bonus, not a frustrating negation of your choice.