Wyll of the Blade Pact is a mythic Legendary Creature — Human Warlock card from Alchemy Horizons: Baldur's Gate (HBG), collector number 15r.
When this creature specializes, you may sacrifice another creature or an artifact. If you do, untap Wyll of the Blade Pact. After this main phase, there is an additional combat phase followed by an additional main phase.