Blood is an extremely rare and expensive material found in only two robloxians ever found on planet Roblox and every human found in the dimension called Reality. Only one gram of blood was priced of 670 quadrillion dollars. It was priced exactly "sixty seven" because the subject who volunteered to Roblox the planet, kept saying "six seven" while walking through the EMPOWERED POWER RAIL 5V space. It's unknown why they joke about such a number.
This material is a liquid and so rare that Luau is not rare compared to blood. Blood also became the most expensive material on planet Roblox. By the way, the subject from planet Earth - where all humans live, is an electrician who knows more than the most skilled electrician on planet Roblox. Though it was shocking for that subject to learn that the floor in EMPOWERED POWER RAIL 5V's space had exactly 5 volts of continuous electrical charge.
Origins
Blood was found when RSCP subjects entered the portal to Reality, walked 100 meters in EMPOWERED POWER RAIL 5V, and took a non-Robloxian entity to medically examine it off the Reality universe. The non-Robloxian entity was concluded to be a human which was a extremely rare species in Robloxian universe.
When scientists took an example of the liquid that fills humans - who created Robloxians, the planet Roblox, and Robloxia, they were shocked to see as it was made of non-Roblox chemicals. Luau lacks those chemicals.