Iron Curse is the Rank 4 Balance spell wizards can learn from Alhazred at level 42. It is identical in animation to Frost Giant before its update. Like Frost Giant, the Iron Giant knocks his iron chest plate, but oddly, no sound is made when that happens. You would expect a huge throbbing "GONG" to occur, but instead you're met with awkward silence. The experience is horrid enough for me to make a post about it, even if I admit it's not the most important thing to update, it would make using the spell much more enjoyable and memorable.
It would be really nice if a metal giant hitting his metal chest made a metal noise.