The eternity maze is a dungeon that can be accessed by talking to any Pub Owner (excluding Rokoko City and Kleya).
Every five levels, there will be a boss. You must defeat the boss to get to the next level. There are also some clever tricks to prevent players from surviving in the maze. If you die in the maze, you will be transported back to town. Every five levels that you have gone through will be saved, so you don't have to walk through the entire maze each time you enter it.
For example, you can enter on levels; 1, 6, 11, 21, 26, etc.
Before entering the maze, make sure you have some room in your inventory for items.
Lv1) Go straight, take a right, go up the stairs, and follow the road, then take a slight left. Continue going down the staircases. You will soon fall into a hole. (136,133)
Lv2) You will be transported into the middle of some hellhounds. Turn around and go up the stairs, then take a U-turn to get down to the dark area with skeletons. (129, 40)
Lv4) After going into the dark area, you will jump to level 4. It may seem counterproductive, but go up a level. (80,65)
Lv3) Go straight forward, right into the wall. (80, 150)
Lv4) Go straight forward, down into the tunnel, (80, 97)
Lv5) A change of scenery, this is the first boss room. Take a right and run down a staircase. Get ready for battle.
When you're done defeating Coagulum, head straight down. You don't have to defeat the Slime in battle if you don't want to. The Slime in the picture is hiding behind the boss. (79,60)
Lv6-9) Levels six to nine are self-explanatory. Just stay to the right, if you go to the left, you will experience a death trap on level 9.
Lv10) The second boss room, Minotaur. Follow the same drill as the previous boss room.
Lv11-14) The same as levels six to nine, just keep walking the same way. You will experience your MP slowly going down in these maps.
Lv15) Different than the other boss rooms, this boss room is filled with Colons. Don't let their Level 5 status fool you, they have a lot more HP than regular Level 5 Colons.
Go down the stairs to meet Boss Colon and his two minions.
You should lure the Boss Colon away from the other two Colons. Don't bother with the other two colons, you only need to kill the Boss Colon to get to the next floor.
Lv16-19) Keep going to the right as usual, until level 18, where you should take a left. Don't worry if you accidentally take a right, you'll just be teleported back to the two staircases.
Lv20) Another boss room, this time it's Plant Dragon Nepenth. He looks big and scary, and has two tails sticking out of him. You only have to attack Nepenth's main body, you don't have to kill the tails. Beware, this boss likes to poison.
Lv21-24) To get past these levels, you will need to collect items, or a mysterious force will push you back. After you do this one time and defeat Frosches, you will not have to collect them again.
To get to level 22, you will need: 30 Red Frog Skin (Flame Brosch)
To get to level 23, you will need: 20 Purple Skin (Molbrosch)
To get to level 24, you will need: 10 Albino Frog Eyes (Vanilla Brosch)
To get to level 25, you will need: 5 Frog Armor (Broscher)
Lv25) Did you get the underlying frog theme? The next boss is a frog trio, known as Frosches. Frosches can paralyze, which isn't too bad, until Frosches gets low HP. When this boss' HP gets low, he generates a critical attack (usually between 10,000-13,000), which can kill most people. You should have your pet equipped and ready to heal you, so after you are revived, you can give a last finishing blow.
I died about twice while the boss had low HP and had to get my pet to revive me ; - ;