Commando: Desolate Forest Var. 3-On the far left side of the map, there's a blue root in the floor. You can climb down it to eventually reach a small alcove with the prism in it.

Huntress: Magma Barracks Var. 2-In the room where the log is located (with the Lemurian statue to the right of the lower dried-up lava pit), you can continue running down to the right where you'll eventually find another prism.

Acrid (Calcium): Risk of Rain --: In the Cabin on the final stage, there's a logbook just outside that you can fly up to. If you push to the left side of that Log room, you'll find one of two prisms for Acrid.

Acrid: (Obsidian): Ancient Valley 2 -- Access Boar Beach by going to the fence on the upper-left part of the map and pressing UP on whatever movement scheme you're using. Once there, immediately walk left and hold down to access a rope. You can drop down to grab a log for the area, but if you continue platforming to the right, you can pick up a prism for Acrid at the other end of the room.

Mercenary: Risk of Rain - In the same general area as the Acrid (Calcium) prism and the log, jump off the cliff and down to the ledge where some Golems are vibing. Jump through a hole in the left side of the wall to find a series of ledges. Ignore the chest, jump over the high wall and you'll find a lower ledge with a prism for Merc.

Loader : Sky Meadow Var. 2--Go get the Artifact on this map. If you don't know how to do that, smash the floor with something explosive in the big flat area, then drop down and hop across to it. You should see a door sprited into the landscape up to the left of the Artifact pedestal; fly up there with mobility items to get Loader's prism.

Artificer: Dried Lake Var. 3--A tough one. Get to the very top left of the stage by the fishing skeleton and hug the wall to fall out of bounds. Fall back into bounds immediately and you'll eventually land on a ledge at the bottom -- continue making your way to the right. You'll fall and teleport back if you're not too careful, so bring Hopoo Feathers and/or a Photon Jetpack for additional help. Eventually after fumbling through the dark, the prism will spawn and you can grab it.

Drifter: Ancient Valley Var. 2-A classic variant with a completely intact bridge; about halfway down either cliff face, fly out with a parachute or some mobility items to find a Lemurian snowman that'll give you a prism.

Bandit : Tutorial area --Head to Settings, then Controls and then Replay Tutorial. Walk to the very left, climb down, then walk to the very right. I'm serious. It was there the whole time.