Ancient Amuletor (HP)

All you have to do for this trophy is to shoot or otherwise hit the torches that dot the levels. A good place to grind this out is level 1-1. There are quite a few torches on this level and you can get some from just about any tower. Just move from tower to tower hitting the easily reached torches and continue on with the level. My trophy popped during the level after the 22nd torch was extinguished.

Note: This was glitched prior to the first patch.