They aren't Wall Masters in TP, like Skeletonband said, they're called Zant's Hands. Real Wall Masters go straight for you and bring you to the beginning of the Dungeon, these just take the Orbs from you. I didn't find them as scary as Wall Masters in MM and OoT (which really freak me out btw), but I find myself nervous whenever there are any hand enemies in Zelda. They're all a little creepy.