It's just a massive card advantage engine, ripping resources from the opponent while stocking your own hand
At the time, these foil cards were exceptionally rare, much rarer than drop rates that players would find today
A 2/1 for only one black mana, Gravecrawler's inability to block simply means that it will be getting used primarily for attacking and fueling sacrifice-based abilities
Golgari decks are resilient and hard to stop permanently because killing their creatures often helps them
Its defensive power and disruptive potential make it one of the most unique candidates when discussing the strongest Pokemon card in strategic play
They're pretty much designed so you can play it and shout "BURST STREAM OF DESTRUCTION!" Captain Obvious: Used very often, usually when a monster is destroyed or a magic/trap card is used, so it happens virtually every move