Cards like Black Lotus, for example, which generate three mana for zero investment, offer an unparalleled tempo advantage that defines the pinnacle of the MTG power level
So long as you can protect them, if your opponents care about cards entering the battlefield and dying, your opponents theme can be completely nullified, leaving them helpless
She's an aggressive reanimator Commander who chucks cards into your graveyard and then gives you the capacity to bring them to the battlefield for two mana, provided their power is three or less
They thin the deck and allow the build to be more focused
Its also capable of drawing cards off of artifacts that are flickered, or brought onto the battlefield via other means, like with a Replenish, for example
If it's legal in the format you're playing, and your deck includes white, there's a pretty good chance that you'll want as many copies of Path To Exile as you can fit