Would a Blood Artist trigger if i sacrificed a Diregraf Ghoul to a Bloodthrone Vampire ? Not quite sure about some of these rules. It has been since 5th edition that I played. Cards did not have as many options like the newer ones do. I could not for the life of me remember if sacrificing a creature counted as died. I thought that if a creature left the battlefield to the graveyard by means of sacrificing, direct damage, destroy, and combat damage that would be considered dead/died.
Here is a page with links to the basic and comprehensive rules, Gatherer and tournamnet rules.
The comprehensive rulebook is definitive, but it's better to start with the basic rulebook. Gatherer will be useful to look up card wordings - the Gatherer wording is definitive.
MtG Rules Advisor & Goth/Industrial/EBM/Indie/Alternative/80's-Wave DJ DJ Vortex
DCI Certified Rules Advisor from July 14, 2009 to July 14, 2012 DCI #5209514320
Wit found in Rules Q&A
RPJesus: "Man, screw the rules, I'll play a game of 2HG Archenemy Planechase Emperor EDH draft yet. Once I figure out the rules for it..." Chaikov: "Of course, casual Magic may be played any way your Pokemon group agrees on..." and "It's not logic. It's Magic!" GainsBanding: "I only play online. The Magic Online shuffler is AWESOME!" Ikegami: "one might think [adult cats] would make excellent tokens. The issue, though, is that they are very hard to exile. They return to the battlefield more often than an undying creature." Astarael7: "Does 121.1 imply that players are supposed to wear their poison counters?" Bimmerbot: "If you move the wrong way and [the poison counters] fall, it's a game rule violation" Helluminatus: "Just remember, if it looks like a duck, smells like a duck, and quacks like a duck, but the oracle text says creature - Bunny , then by god, it's a bunny." MadCow21: "Who are you and what have you done with the real Chaikov?"
There is a forum here dedicated to people getting back into magic. I checked it out too late, but it is well written and would have been a big help if I read it earlier. I suggest you check it out.