It's good to use all left-over mana to pump it as well, and it could even be an invitation to trigger Afflict rather than take a full hit
This plays its best roles in go-wide, Proliferate, or artifact creature strategies where ED-E can either be enabled to the extreme, or it can synergize with other effects in the deck
I built a deck using both of my new favorite cards for Standard (at the time), here's the deck list: Creatures Sorcery 4x Thoughtseize 4x Damnation 2x Wrath of God Instant 4x Darkness 3x Dawn Charm Enchantment Artifact 3x Claws of Gix Lands 5x Plains 6x Swamp Sideboard 2x Wrath of God 3x Sudden Death 3x Distress I could gain huge card advantage with the Plans and lock down my opponent using Maralen to slowly drain their lives
Even PSA 9s (where there are now over 5k graded) fetch several thousand pounds on eBay
In order to make my list, these cards must be good in casual formats like the aforementioned Commander or things like Type Four, Five Color, Highlander, Cubes, and multiplayer