So, you want to go with Biological Symbiosis, hmm? Well, whether you've chose this power because you happen to be a fan of Venom or any of the other Symbiotes from the Spider-Man series or not, this is a power that should not be taken lightly.
As for why I say this, it is because you, the user, have become a host to a physical being, allowing you to manifest this sort of power in the form of a symbiotic costume, granting you enhanced physical abilities, like superhuman strength and prowess, as well as enhanced regeneration and immunity.
Though like anything in life, there is a price to everything. You see, when you use said symbiote costume, there is a possible chance that the symbiote may take you over completely and/or driving you to the point of insanity. Other than that, both the symbiote and it's host may need each other to survive, as well as possibly needing to be at a mutual relationship on any degree. Plus, there might be a possibility that while using the symbiotic costume, you could be weakened by a certain power or substance, like sound waves or fire for a great example.
Now then, enough about the pros and cons about Biological Symbiosis, let's talk about the abilities you can use at your disposal when using a symbiotic costume. As for what said abilities are, here's a list for you to see below this paragraph:
-Amorphous Physiology
-Camouflage
-Dermal Armor
-Skin Hardening
-Supernaturally Dense Tissue
-Dimensional Storage
-Divided Mind
-DNA Replication
-Elasticity
-Genetic Memory
-Goo Generation
-Knowledge Replication
-Life-Force Absorption
-Malleable Anatomy
-Natural Weaponry
-Claw Retraction
-Enhanced Bite
-Tentacle/Tendril Extension
-Organic Constructs
-Parasite Physiology
-Power Replication
-Power Suit
-Powered Structure
-Prehensile Hair
-Regenerative Healing Factor
-Shapeshifting
-Size Manipulation
-Symbiosis
-Weapon Manipulation
Now as for any known users for having a Biological Symbiosis, the most well-known users of this type of superpower are Venom, Carnage, and all the other Symbiotes from the Spider-Man franchise. Now then, let's begin, shall we?