Dream Altar is the third and final subchapter of Chapter 2: Old Site B-Side in Celeste. The subchapter has a lot of difficult space block challenges including some rooms with a single large space block. The red Crystal Heart to complete the B-Side can be found in this subchapter.
Gameplay[]
This subchapter is solely focused on making challenges around space block traversal and less of a focus on space block jumps specifically. A lot of rooms here will need fast dashes to avoid being thrust into spikes from a space block. The fourth and fifth rooms of the subchapter are unique in that they are enormous rooms with a single central space block which has to be passed through many times all around it to navigate to the end.
Strategies[]
Room 1
In this room, a single long space block is found above the starting area which should be dashed up through from below after bouncing on the spring. Then you need to go a bit to the right to dash back down through it, but make sure to dash straight to the right quickly after exiting before you fall into the spikes below. When you bounce on the spring, be sure to keep holding right as to not bounce into the spikes above, then you can dash up through the space block again. Move right after this, fall down the corridor, then jump off the left wall to allow yourself to dash straight up into the space block at the end corridor.
Room 2
This room will have a ton of small space blocks to rapidly dash through. The first two just have to be dashed straight up through, then the third one must be dashed straight right through. Right after dashing through the third space block, dash straight down to evade the spikes on the wall. Move to the left a bit and then jump off the wall at the bottom into the dash crystal. From there, dash diagonally up-right into the next space block, and right after that dash down-right into another space block and do a space block jump out of it. This will be awkward as it's a diagonal space block jump, but it functions just the same and allows you to reach the right wall. Climb up this right wall, then dash diagonally up-left through the last space block and dash again to the right to finish off the room.
Room 3
Dash up through the first space block and swerve to the right to land in the area between both sides' spikes. Wall jump from the left to the right and dash up through the second space block, then do this again as you go to the right to reach the next space block. Fall through the small gap in the platforms above, then when you arrive at the larger square-shaped space block, dash diagonally up-right through it. Fall down a bit, then dash diagonally up-left through it. Dash straight up again through another space block, then dash straight right and do a space block jump out of the other space block. From there, nudge yourself to the left as you fall and dash right into the last space block to exit the room.
Room 4
This room has some skull binoculars available to preview the room, if needed. In this room, a few key tokens are scattered about which you can get to using the tall central space block. Start by dashing straight up through the space block and collect the key token at the top while quickly wall jumping above the spikes to fall to the right. Line yourself up and dash left through the space block, doing a space block jump. Climb the left wall and about halfway up, jump to the right to get over the floating platform and collect the next key token and continue falling to the lower area. From there, dash to the right side of the space block, then fall and dash back to the left with a space block jump and you'll reach the final key token. Jump off the wall and do a diagonal up-right dash through the space block in order to get over the key-activated platform. After you get shot out, dash to the right to the wall above and start doing wall jumps to get out of the room.
Room 5
This room has some skull binoculars available to preview the room, if needed. This room has a large central space block similar to the last one, but this one is wider. From the small opening at the start, do a diagonal up-right dash into the space block. Either do a jump out of the space block or re-grab it if you know how to, then dash left through the space block from the upper half of the hole you arrived at. After doing a space block jump to the left, climb the left wall and dash straight up into the key token and dash crystal. The key-activated platform will be moved just outside the right side of space block, so after you collect these objects, you should fall down and dash to the right and collide with the key-activated platform (this is unneeded but helpful). From where you arrive, dash diagonally up-left into another hole in the left side, then fall down a bit before dashing straight to the right into the opened area. You're free to do a dash to the right to get above the spikes below, then wall jump up until you arrive at the dash crystal, then dash up-right. After arriving at the top-left area, hold to the right and dash right through the space block with a space block jump and you can complete the room.
Room 6
This will be the cassette block room of the chapter. There's actually no way to die here and there are only blue cassette blocks. Right as the cassette blocks disappear (aka turning to pink), dash straight up to collect the dash crystal, then dash straight up again. When the blocks come back, quickly do some wall jumps back and forth and you should be able to reach the other dash crystal, and from there you can keep stalling until you can wall jump all the way to a height where you can dash into the Crystal Heart to win the level.