Grem2 Blood Rules Guide


Modern day Grem2 are known for the change of colour with their two blood types, this change in blood colour is commonly called a “Recessive Rush”, but this physical attribute played a more significant importance to their ancestor species thousands of years in the past.

The ability to change blood colours (originally coined “colour flushing”) first originated from their Gremtuk Ancestors whose color flushing was used freely for many different purposes. The most predominant of which was visual communication between others of their species and even extending out culturally to other sentient creatures. Colour flushing also provided them a considerable boost in strength and stamina as well as aided in camouflage, which helped them blend into the backdrop of their natural habitat. Whether they were hunting or being hunted, this ability to fluently use a multitude of different blood colours gained them an evolutionary edge in their ancient environments.

However, Modern Grem2 have lost a majority of these capabilities due to the hybridization and genetic modification of this species over time. With Grem2 living simpler, more care-free lifestyles, the use of these ancient abilities were no longer beneficial to them, resulting in the current evolutionary modifications to their species. This leaves Grem2 lacking the ability to trigger similar ancestral blood rushes akin to Gremtuk.

Modern Grem2 are limited to only alternating between 2 blood colours and can only be controlled through adrenaline rushes, restricting their range of when to use it. Recessive rushes can also grant a slight boost in strength, but this, in addition to their other more restrained abilities, pale in comparison to their ancient counterparts.

Standard Grem2 are the only species (of all the many differing subspeices) who are capable of demonstrating the fight-or-flight response commonly referred to as a “Recessive Rush”. For Gremtuk, being able to control and boost your strength and stamina significantly, having full control of your blood colours and its colour spectrum, and communicating with your blood colours freely meant surviving successfully in a harsh desert environment.

A Grem2’s Ancestral form: Gremtuk, hunting for their group, demonstrating the use of their blood colours to camouflage themselves into the backdrop.
- Art Created by Backwardssnappy -


The Standard Grem2 are the only species capable of a fight-or-flight response commonly referred to as a “Recessive Rush”. This has similar capabilities to an adrenaline rush in humans, marking a spike in adrenaline to increase blood flow and respiration to saturate the muscles with oxygen. When it comes to the makeup of a grem2’s body, unique glands in the lower half begin to react to the chemical properties of their adrenaline which signals the body to secrete hormones that give a grem2’s blood the ability to react in a very unique way.

GremCorps scientists have disclosed that the hormones secreted by this process trigger the production of natural chemical stimulants produced by said glands in the hips & lower legs, which causes a noticeable change in blood pigment. This is known as a grem2’s recessive blood and is visually signified by the legs and feet, which are coloured the same as their recessive blood colour. All standard Grem2 have a noticeable flush of this resting recessive blood color, which is where the term Recessive Rush was derived from.

On top of heightened neurological responsiveness, this allows them to tap into the energy reserves packed into their thighs and forearms to fuel the need for extra speed,strength, and endurance.

Modern Day

Current day Grem2 Recessive Rush is not as controlled as it was for their Gremtuk ancestors. They still retain their ability to redirect their strength using their blood rush, but to make use of it requires a state of heightened adrenaline. This is useful in a pinch but can exhaust a grem and lead to possible cardiac issues if forced for a prolonged period of time.

◈Rules & Guidelines◈

Blood change & placement

The visual above illustrates how the blood colours are placed on the body. Figure A. depcits the grem in their "normal" state while Figure B. shows the "Recessive Rush" state. The Dominant Blue hue ( D for short) is shown as being the "Dominant" Blood colour, while the Recessive Red hue (R for short) is shown here as the "Recessive" Blood colour.

The "Dominant" Blood hue will traditionally show on the claws, finger pads, inner mouth area, inner ears, and nails. Whereas the "Recessive" Blood hue will permanently colour a grem2's legs and feet area. When the "Recessive Rush" takes over the body, the areas that will drastically change their hue from dominant (D) to recessive (R) are only within the inner ears, mouth area, and optionally within the part of both eyes wherever the dominant color (D) was present.

When in "Recessive Rush", the Recessive Red colour will always show on the legs while the Dominant Blue colour will remain the same hue on the nails, finger pads, and claws with no present changes.


As a grem becomes scarred over time, their skin is exposed by wear and tear. These scars are typically hued with either the Dominant or Recessive colour depending on where the scar is placed on the body.

The visual above shows that a scar placed above the hips will be in a Dominant colour (EG: Torso, Arms, Neck, Upper Back, Head Etc.) , whereas anywhere below the hips will have scars shown in the Recessive colour. (EG: Hips, Groin, Legs, Lower Back, Tail Etc.)

Anywhere in between these two sections can have a very slight gradient effect to it.

* Scars on grems can look vibrant or slightly faded depending on your preference.




The Dominant colour can be placed anywhere in the eyes and can come in a multitude of different varities. 



This eye mutation is somewhat uncommon but very much present in Grem society. Here is a visual of heterochromia being illustrated in very basic terms. When using heterochromia on your grem, it's always mandatory to have the Dominant colour visually present somewhere in both eyes; however, placement, and shape between the two can be mismatched.



Grem eyes, even blinded, still require the Dominant colour to be shown in both eyes, as blind grems are still able to go through their "Recessive Rush". This will need to be illustrated on their refsheet .

*The eyes can be faded in hue in order to illustrate blindness more effectively.



⮞ Eyes can not have shape changing Irises during a "Recessive Rush".

⮞ Markings are not allowed on the bottom of the feet, this includes feet pads of any sort. The legs of a grem2 are able to have markings placed over the recessive colour of the leg, but are limited to a 50% coverage. If the markings cannot be distinguishable from the Recessive colour, then it will be denied approval.


full 50% LEG Marking limit

⮞ This image will give you a idea on our most extreme percentage for a solid marking over the recessive colour on the legs.  




Heightened Emotion & Recessive Rush

Recessive Rush is not limited to presenting itself only through aggressive emotions, but can be activated through any heightened expression that can cause adrenaline to circulate through the body. These headshots provide an example of different emotions that also make a "Recessive Rush" active in a grem2. You are not limited to these emotions, just be sure to understand that only very strong emotions can cause this rush to happen.


When giving your grem any type of prosthetic as a replacement to a limb or body part, it's mandatory to have the blood colour marked in some fashion, this needs to be illustrated as being a light identifier or is just any sort of ingrained marking that shows the blood colours being placed in that area. Any prosthetic that is affected by a "Recessive Rush" will also go through a recessive rush as well, making any marking that identifies as the Dominant colour to change to Recessive. Here is a simple example to get an idea of marking placement for prosthetics. 


Hybrids blood rules


⮞ Snowgrem Guide

⮞ Mantagrem Guide