Bloody Mary by Arnel Renegado
Extract your blood and reveal a chosen card.
A spectator selects a card and loses it in the pack, after that you ask your spectator to pour water into your palm. Suddenly blood appears and forms their chosen card. A combination of a card routine using blood to create a bizarre moment.

Easy to do and perform
Show your hand empty
End clean
Any borrowed bottled water
Use it on your mentalism routine to reveal a prediction
Visual
Reveal any image
Easy to find gimmick