At least 2 bands are known with the name Pacto de Sangre, one from Spain and one from Puerto Rico. 1) Pacto de Sangre is a hardcore band formed in 2007, in Jerez, Spain. They are curently signed to LaotraopciĆ³n records and belong to LaXOtraXOpcionXCrew, a loose collective of musicians and friends from the hardcore/punk Andalusian scene. 2) A christian heavy/power metal band from Puerto Rico. So far they have only released one full length album entitled Alerta, released on 2003 through Khaosmaster Productions. Read more on Last.fm