Can Riot stop pretending Grasp of the Undying isn't overpowered?
This mastery is in a tree designed for defense. It shouldn't be building stacks when a champion ISN'T BEING ATTACKED by another champion. This is the biggest problem with the keystone, and is what allows stupid strong champs/builds like Mundo or Tank Akali to flourish. It's why any AD champ who builds the least bit of HP gets the keystone over Warlords.