It plays extremely well with Voltron commanders and similar strategies that have a specific creature they want to keep around, but the impulse draw you get off each creature you control dying expands the use cases
Some decks are able to put enough pressure into play where you expend all your resources putting Griselbrand in play, attack and gain seven life, but cant draw seven cards because youd die on the swing back
Plus, losing to your own Warriors OathWarriors Oath is not the worst way to bow out of a pod
Death triggers have always been a thing in Magic , so maybe it shouldn't be a surprise that the original Dragon Spirits still see quite a lot of play 18 years later, even though they were made to take advantage of a legend rule that no longer works the way it did upon their release
There was an error retrieving a chart for Elephant Graveyard I guess the one copy is graded BGS 9, so maybe that carries some premium (though not that much premium)