Ob Nixilis, Unshackled
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 reason is that energy creatures tend to have enter-the-battlefield effects (ETBs) that make energy, so it's beneficial to blink them
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
For general purposes cards that discount other cards are also considered ramps in Commander
I knew that as soon as I could hit a Wheel, I stood a good chance of being able to chain through them, as the game had gone on quite a long time at this point (and I was stuck top decking lands!)