Item #: SCP-XXXX

Object Class: Euclid

Special Containment Procedures: SCP-XXXX is to be contained within a hermetically sealed room measuring no less than 2.5 metres tall, 3 meters long and 3 metres wide, with humidity no higher than 35%. Testing is permitted so long as 2 or more personnel are in attendance.

Access to SCP-XXXX's containment unit must have an air-lock entrance which can be ignited to 1375° Kelvin in the timespan of 2 minutes. Any dead organism in SCP-XXXX's containment unit is to be taken out very carefully and disposed of by using fire.

All personnel entering SCP-XXXX's containment unit are required to have:

A Standard Class 2 Hazardous Materials Suit

Thick elbow-length leather gloves

Radio connection to any outside staff

If any personnel fail to follow the requirements, if not infected, moved to another project without delay. If infected, they will be decontaminated.

Description:

SCP-XXXX is a class of fungi, classified in the █████████ genus. SCP-XXXX's growth rates can be as high as 2 metres cubed an hour. SCP-XXXX's mycelium can break through all stone-based materials. However, SCP-XXXX can be instantly incinerated by igniting it.

Every 4 days, 2 trained personnel are to move into SCP-XXXX's containment unit to cut down the sizes of SCP-XXXX to 1m3.

When a living entity, (henceforth referred to as SCP-XXXX-2,) comes into direct contact with SCP-XXXX, SCP-XXXX will release spores onto SCP-XXXX-2, which bury themselves into the skin. In most scenarios, symptoms appear after 1 minute to 7 days, usually dependant on the size of SCP-XXXX-2. The spores will travel through the bloodstream and reach the brain, causing complete lack of control and consciousness. If not terminated within 3 days, SCP-XXXX-2 will suffer a fatal stroke, effectively dying and allowing SCP-XXXX to grow out of SCP-XXXX-2.

Even when specimens of SCP-XXXX are separated, they are able to communicate. This is apparent when a living being is within 50m, as all specimens of SCP-XXXX begin to grow towards it.

When SCP-XXXX-2 dies, if sentient, a large mushroom, usually measuring 0.50m in height, will grow. After the initial growth stage ends, and the mushroom is considered "adult," undecipherable and seemingly random letters

Testing Log XXXX-01:

+ Open Testing Log XXXX-01: - Close Testing Log XXXX-01: I feel that more funding for research on SCP-XXXX is worthwhile. You all have something fascinating here.

- Guest Researcher █████ Subject Results Date Butterfly 3 minutes after perching on SCP-XXXX, the butterfly started to fly around the room in circles around SCP-XXXX. 10 minutes later, the butterfly collapsed, with SCP-XXXX growing out of it. 03-12-0█ Guinea Pig 1 hour after being infected, the Guinea Pig started to emit low-pitched noises at 7█ DB, before shards sharp of [REDACTED] mushrooms appeared. Guinea Pig terminated 3 minutes. 03-12-0█ D-35825 After 10 minutes, D-35825 started to visibly shake. D-35825 then proceeded to move towards the door, clawing against it, screaming. D-35825 contaminated after 10 minutes by the Hazmat-acquitted security. 03-14-0█ 'For Science' is not an excuse when involving D-classes no reason. We may have collected data, but completely unacceptable nonetheless. I heard that the Guest Researcher got dealt with already, so no need in bringing it up.

- Dr. Kestrel. - Close Testing Log XXXX-01:

Addendum XXXX-01:

When an outbreak due to improper fitting of [REDACTED] occurred, after a host of SCP-XXXX was terminated, the large mushroom that growed out of the terminated, read "WE KNOW WHAT YOU ARE DOING WITH US. LET US GO." No other instances of Roman letters on the cap of SCP-XXXX occurred afterwards.