The Thallids have the ability to communicate with plants and animals by spreading telepathic spores from their bodies. This is also how they communicate with other races.

 While Thallids are typically 4-6ft tall you can spend a short or long rest to increase your size to Large or decrease your size to Small. While large your carrying capacity increases by 3d6 and you have advantage on strength ability checks or saving throws. While small you have a disadvantage on strength ability checks and saving throws but have an advantage on stealth checks and dexterity checks. You can also use this ability to create a shelter for yourself and your allies. Additionally you may root yourself to the ground and grow fungus and mushrooms in a 20ft sphere to make the area difficult terrain. Your transformations last 1 hour.

Thallids have the ability to regenerate lost limbs and health after a short or long rest. The health you regain after a short or long rest increases by 1d4 at level 1 then increases to 1d8 at 4th level and 1d12 at 8th level. Additionally if you have lost a limb you may spend a long rest to regrow that limb.

As a plant race you are weak to fire. While being damaged by fire you cannot regenerate unless by magical means. You take double damage from fire.

Thallids are mostly true neutral however there have been cases of primal Thallids who will attack anything they see. Then there are those who stand up for their tribe and for what they believe in. Although all Thallids seem to have a particular hatred for elves.

Thallids are between 4-6ft tall. Your size is medium.

As a Thallid your CON score increases by 2 and your WIS score increases by 1

You can speak, read and write Common and 1 language of your choice. Note you can only speak through your Fungal Speech ability.

Your base walking speed is 30ft