although they normally have complete control of the fungi  some parts of it act as if the y have a mind of its own one of these parts is the tendrils which will often act ill regard of the host but will sometimes listen if they choose.

since the being is no longer a single entity and is more of a pile of sentient spaget the host is able to change form into whatever a pile of spaget can form such  as its usual state of a humanoid type creature but can also squeeze through gaps get taller but skinnier of shorter but bulkier but since it is the same amount of fungal no stats are gained form this.

fungal beings are closer to nature than most and have the ability to communicate with plant based organisms telepathically although its not clear how they do this it is theorised that it is based around the pheromones released from the fungus.

immune to sleep a fungal being doesnt need to sleep although not needed they can enter a hibernated type state to regenerate any lost parts.

when wet they seem to become faster and stronger as if powered up by water (advantage in attack rolls with +5 and 85 feet movement per turn) with the downside of after a a minute and a half result varies  they become over hydrated and becoming sluggish as they gained to much weight(disadvantage in reaction and attack rolls and 15 feet of movement) 

since they are rejected form society they never got an education not knowing how to reed or write they only learnt how to survive (disadvantage in intelligence)

as the fungi becomes more dominant the hosts physical strengths can change as if the one in the legs and are dominate they become faster(from 30 feet to 60 ft movement) and stronger (+4 to attack rolls and +4 passive strength) but if the fungi in the body becomes dominant it becomes slower but tougher skin(*1.3 of max health is added and +3 armour ) but becomes slower as a result(20 feet of movement)

the fungi can split from one another either as a reaction or on command but one the they split they become weaker as if they split in half they become 50%(just half damage and if the number is even then go for the lower one) weaker and if they split into 4 they become 75%(lower attack by 4 times if not possible make it lower roll once more then take away the second roll from the second) the max they can split is eight at which they are to weak to do any more than a scratch(1d4 attack).