Slicing your palm open

[WingedPegasus]

It's also a good place to cut without cutting a major artery.

And probably the easiest way to be able to control the bloodflow and have access to it. Think about it. You wouldn't be able to cut the chest without going through the cloths and you'd have to cut in a horizontal line as opposed to vertical in order to collect all of the blood without spilling.

You could still just prick a finger or thumb, like people who have to test their blood sugar. Smaller cut, heals faster, hurts less.

[Ukko]

You could still just prick a finger or thumb, like people who have to test their blood sugar. Smaller cut, heals faster, hurts less.

Dont be a wimp. I say, cut the whole hand off!!

[WingedPegasus]

Dont be a wimp. I say, cut the whole hand off!!

Enjoy your death by blood loss.

[jelgate]

Enjoy your death by blood loss.

People live normal lives all the time after losing limbs.

[WraithCommander]

It hurts us Wraith. However is great for visual effect

[WingedPegasus]

People live normal lives all the time after losing limbs.

Indeed. But rarely after slicing off their own appendage, I imagine.

[SF_and_Coffee]

It's actually an ancient ritual several thousand years old. Basically it is meant to show brotherhood, and usually the way it goes is that when you cut your palm open you clasp hands, and now you have a bond of blood. Blood bonds are very powerful bonds of friendship.

Yeah, but when the blood is just to test something, you're not doing a brotherhood thing.

You could still just prick a finger or thumb, like people who have to test their blood sugar. Smaller cut, heals faster, hurts less.

This.

[Onealwasoverrated]

My guess is that they palm a small bag of fake blood and slice it with a knife. Slightly cover the cut (the empty bag) so it's never shown and the blood sells it.