Pact of Negation [Modern Masters] Ogre Demon Set: 30th Anniversary Edition Type:

Set: 30th Anniversary Edition Type: Artifact Creature — Beast Rarity: Rare Cost: {6} Clockwork Beast enters the battlefield with seven +1/+0 counters on it

They likely refer not to one mage

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Promos Type: Legendary Creature — Human Elf Ranger Rarity: Rare Cost: {1}{G}{G} Reach

but she was rescued by Urza and joined his crusade

Pact of Negation [Modern Masters] Ogre Demon Set: 30th Anniversary Edition Type:Set: Modern Masters Type: Instant Rarity: Rare Cost: {0} Counter target spell. At the beginning of your next upkeep, pay {3}{U}{U}. If you don't, you lose the game. Those who expect betrayal at every turn are seldom disappointed.