She very strong, and players often won't kill her since they can draw cards without any investment
(It was such a low population card I probably should have held onto it and now Im kicking myself for selling this particular one
The aptly named Extinction doesn't just keep a tribal opponent's board tapped, it gets rid of it entirely
Then spend 1 mana to turn Volrath into Grim Poppet, removing the -1/-1 counters from Volrath and putting them on other creatures, letting you machine-gun down opposing creatures while generating mana
Then, unlike with Heros Downfall, you have the option to cast a three-toughness Creature with Lifelink later in the game, which can help keep opposing small Creature decks at bay
For the cost of 5, those stats dont seem particularly impressive at first glance