b a WeeklyMTG | Magic: The Gathering x Final Fantasy | Limited and Full Set Discussion (Video)
I like this card a lot as a commander for Eldrazi/Karnifacts just because there is not a lot of reliable land ramp in the colors (or there lack of), so having a reusable piece of ramp that also can grab nonbasics (meaning you aren't stuck with having to jam a bunch of Wastes) is absolutely the fuel that some of those archetypes need to get going
Dark Confidant has also been a long time Plan B for combo decks, whether in the sideboard or the maindeck, such as Paulo Vitor Dama Da Rosas Dark Depths deck from Pro Tour Austin: Creatures (11) Lands (24) Spells (25) Dark Confidant is great for finding combo pieces and great when you dont assemble the combo
In a way it reminds me of a black Mastery of the Unseen
But at the time, it had leagues more depth to it than I think I would have expected from a card called island
Its a nifty way to stop creature recursion, since the creature you animate will self-exile if it leaves the battlefield