Unless the agro player can kill this on sight it ends games quickly, even if it dies before it kills them it has still usually had such an impact on the life totals that the game is out of reach
With the handful of demons in this deck, he can potentially draw you a few cards when he enters the battlefield using his Prince of Chaos ability and he can leverage his status as the Lord of Torment in order to have your other demons dole out big damage when they enter the battlefield
Barrowgoyf's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1
Note: While I never delved too far into the Final Fantasy video games, I did play FF8 when it released (that opening cinematic blew my mind as a lad), and I nearly beat FFX , but was derailed by a crippling BlitzballBlitzball addiction even without the Jecht shot
Reminds me of Extract from Darkness, but more splashable
O-Kagachi, Vengeful Kami O-Kagachi, Vengeful Kami hates when opponents attack its controller