• S-Rank creatures are ones whose trait allows them to do their job well under most, if not all, circumstances and do NOT need external help to reach optimal usefulness.
  
• Unlike S-Rank creatures, A-Rank creatures are ones supposed to be just as good but they have an IF. Maybe they only really work with a specific class. Maybe they need a buff or debuff to be around, or another creature in your party, but there is a condition that must be met for them to reach optimal usefulness. They can still perform without it but they won't be performing at their best.
  
• Unlike A-Rank creatures, B-Rank creatures require their condition to work. They are very good within it, but without it their trait either won't trigger, or it won't have a noticeable effect. They are essentially one-trick ponies.
  
• C-Rank creatures are creatures with nearly useless traits, but that have at least one redeeming use. Maybe they counter a very powerful creature that would be a problem otherwise. Maybe they are good against a boss, or in a specific class, or in a specific realm. Anyway, they have an use, but you just don't want to have them around always.
  
• D-Rank creatures are fillers. Maybe they have a very high stat you can exploit. Maybe they have a trait that is useless by itself but very powerful when fused with another. They are creatures to know about, but you will hardly ever use.
  
• F-Rank creatures are to be avoided in your party. You have no reason to use them, and you're likely to make your party worse by having them around.

1. This floor also has Brim Smith, who also appeared on the previous realm, reducing the number of new creatures from 10 to 9. If you are a Trickster, your starter is also present, and you're down to 8.
   
2. Check next section.

At this point, you have unlocked fusion, and some gameplay options other than attack everything until they die have become available to you. Most of them are not really fully feasible at this point with the options available, but you do have some ways to improve your party. It mostly consists of compressing all the traits you had previously on 3 creatures, freeing up slots for 3 creatures more.

If a trait does not say it does not stack, then it does, but it must be on two different creatures for it to work.

• Fuse Coldslam Yeti with Mud Golem, so you spread Blind and Freeze around when you Provoke and is Attacked. Toxdweller Bloodbather will apply 3 bombs at start of combat. Give it an Affliction Spell Gem. It starts the game unlocked, has 17 charges, and it is a pretty safe bet you will be able to cast it on every battle without running out. Give it Boots artifacts so it is sure to move before anyone else, as it has 26 Base Speed. If you have unlocked it, you can also give it Inner Destruction, but it is not necessary. Corpse Explosion is an AoE attack and if it kill an enemy it will trigger again, so this combo can actually snowball battles. The enemy doesn't have to die on your turns to trigger it, but if he dies from the bomb and has no other debuffs, the trait won't trigger. Corpse Explosion doesn't say it doesn't stack so it DOES. Move Crazed Leper to the first position and add a Cave Cockatrice to your party to double the number of spells. You need fusion to try this party, so you may want to hold this until you finish floor 9. https://youtu.be/IYtUqHshBgQ
  
• Fuse Plague Alchemist with Koloss Firebrand. While this may seen strange at first, Koloss trait bonus applies to Indirect damage and uses current health, not maximum health, to calculate its bonus, meaning that subsequent uses of Drained will see ever increasing damage. Arcane Automaton can be used to trigger this, the low stat reduction being irrelevant, as long as you can reduce at least 1 point of the enemies' attack, as the majority of the damage will come from Koloss trait. If you can create Spell Gems of Timewalk, make two and give one to each of them. If you can enchant one of them with Chance to Cast Twice, do it and give to the Automaton, as I did. You will need MASSIVE Speed on the Automaton to pull this, try to make Boots with at least 60% Speed bonus. There will be better uses for Plague Alchemist in the future, but it's worth mentioning as it is a valid combo. https://youtu.be/2QbT3E71XmA
  
• Manticore Conqueror and Brownie Mauler can be fused but it is sub-optimal. The reason for this is that Manticore's trait has priority over Brownie's one, and its random targeting may select one or both of the adjacent creatures to your target, leaving one or none left for Brownie's trait to target. The better option is to fuse Manticore with Brim Smith, as Manticore's trait damage and Smith's bonus are based solely on the Attack stat, and Brownie with the Noxious Smog, as its trait damage is based on the damage caused, benefiting from the 75% bonus, and Poison does Attack damage.
  
• If you fuse two creatures that have a "75% more damage plus debuff" the damage bonuses stack.

1. This realm also has Cave Cockatrice, Dusk Ossein, Koloss Firebrand, Monstrous Gargantuan, Sand Giant, and Terror Wight, who also appeared on previous realms, reducing the number of new monsters from 10 to 4.
   
2. Despite being available in an event battle, defeating the Hemomancer creatures does NOT give you summon energy. They must be purchased from Mortem. The enemies on the event are drawn from the list of ALL Hemomancers until you reach Favor rank 1 and unlock the first creature for purchase. After that, you're gonna see only Hemomancer Lord x6 battles.
   
3. "Have more" stats (Aaxer Apocalypse, Dusk Ossein) is not "Gain" and will not trigger this.
   
4. The most useful creature for this would be the Gold Golem, the fourth creature from Azural, who gives everyone stat gains when it is hit. The Maniac Mutant is a non-obvious one that can work when paired with your second starter, the Unicorn Vivifier, although I don't recommend it as the Vivifier can be killed by enemies. While the Terror Wight is a pairing the game itself shows you, it is worse than the Maniac Mutant while suffering from the same drawbacks.
   
5. The Lunar Hemomancer bought from Mortem on this very realm may be a solid creature to combo with the Glutinous Slime and the Plague Alchemist. Do not fuse him with either creature. You're better off fusing him with another Hemomancer, for a triple stat steal.

1. This realm also has Gimp Mummy, Ritual Abomination, and Terror Wight, who appeared on a previous realm, reducing the number of new monsters from 10 to 7.