Giving your opponent a handful of lands is a downside, but sometimes worthwhile if it means decimating their boardstate
For black, we were shown off two splashy creatures
Even as Faithless Looting caught a ban and desperate players began maindecking Leyline of the Void, the Gaak proved too strong and caught the banhammer itself
He lacks any real direction which is a big part of why many decks don't really want him however as he does a bit of almost everything and is such a high power card you do find yourself playing him more often than the meta might suggest
Not only do you stop the graveyard player in their tracks, but you also probably blank a reanimation or recursion spell while doing so
The original Deathstalker , produced by the legendary Roger Corman in 1983, was a proudly exploitative slice of pulp that leaned hard on attitude (rather than, say, millions of dollars in production design)