Several years ago, this led us to ask the question, "Are there different types of boosters we could make that would excite a different audience than what our normal Draft Booster is aimed at?" The first booster to come from this line of thinking was the Theme Booster
The net result is that threats like Hazoret, Kalitas, [Card]Glorybringer[/Card], and just three-drops with high toughness in general, are surprisingly difficult to bring down and can easily take over the game against an opponent who showed too much respect for [Card]Bomat Courier[/Card]
It also nullifies your opponent's graveyard - pretty backbreaking for strategies like 'Dredge' that rely on the 'yard - and allows you to grab your opponent's best threat from the void and play it free of charge (Okay, at the cost of its own life, but it's a lowly two-drop, so who cares?) Paired with targeted discard cards like the popular Thoughtseize, Dauthi Voidwalker has the potential to be super scary
Leyline of the Guildpact also makes all your creatures all colors, which means Scion of Draco and all other creatures you control get all the benefits of its ability