Through the Mirror is the third subchapter of Chapter 5: Mirror Temple B-Side in Celeste. The subchapter brings the player to the corrupted version of the temple inside of the mirror, littered with Seekers and other related objects.
Gameplay[]
In this subchapter, most challenges will make heavy use of bouncing on the heads of Seekers to make tricky jumps. That, and using Seekers to boost yourself a great distance, will be required to complete most of the rooms.
Strategies[]
Room 1
This tall room will start you at the top and will have corrupted spikes all over. You can go either left or right to descend, then keep holding that way until you reach the outer wall. Do a jump off, then grab the next bit of the wall seen below. Jump to the middle and do a straight upward dash into the dash switch, then fall until you reach the dash crystal below. Dash to the right immediately and fall into another dash crystal, then hold left a bit as you keep falling. Dash straight to the right into the dash switch on the wall further down, then jump off into the next dash crystal. With it, dash straight to the left to then grab the left wall. To make it through the corridor below as safely as possible, climb up this left wall as far as possible, then hold right after letting go of the grab button to always safely be able to continue falling down. Fall down another corridor below and you can use your reclaimed dash to go to the right inbetween the corrupted spikes on the wall to reach the end of the room.
Room 2
This room has four key tokens in a diamond pattern with a Seeker and no floor. For a consistent completion, jump to the right off the ledge and then dash up-left, collecting a key token, and grab the wall. Right after this, jump slightly and you should land on the Seeker's head. Do a bounce to the right and dash up-right into another key token, then keep holding right to collect another one and grab the right wall. By holding exactly where you are, the Seeker should charge at you and collect the last key token, so just jump over it and you can get out of the room while it recoils.
Room 3
Jump to the right and dash up-right onto the platform, then dash right again to get inbetween the next two floating platforms. Slide down the left one's right side and jump to the right into the dash crystal, then dash up-right into the dash switch. Do some wall jumps and jump through the barrier into the next area of the room. Jump off the left wall to the right and dash to the right when you hit the dash crystal. From there, bait the nearby Seeker into dashing into you and try to bounce on its head while it does so. This will let you get back your dash, allowing you to jump up to the middle floating platform and dash into the dash switch above and open the temple gate. Land on the Seeker another time to reclaim your dash and use it to get to the end of the room.
Room 4
Fall into the first red bubble and take it up-right for a bit, allowing the Seeker to pass, then dash down-right into the next one. Take this next red bubble up-right again, then dash right and grab the red wall. Allow the Seeker to charge into it and break it, but just before it does you have to jump up and aim to land on the Seeker. The Seeker will be knocked back to the left a bit, so aim your landing there. Fall to the right and use your dash up-left to grab the next red wall. Repeat the Seeker baiting process again, then repeat it again for the third and final red wall. Note that a Seeker's "explosion" when it reforms after being bounced on can also destroy a red wall, so if this is aligned properly you can jump straight up off the red wall and go right after it's destroyed to move on just the same.
Room 5
In this room, there's a gap to the right which seems impossible to cross, but it possible with the help of the one Seeker in the room. Jump across the disappearing platforms, dashing accordingly to just make it to the right of the section with two disappearing platforms, one above another, and a ledge up above. Land on top of the Seeker in this area, then aim to be just to the right of it when it does its explosion and you'll be blasted to the right, easily allowing you to climb and dash to the end of the room.