The middle two are a nice default and makes this a two for one quite ably, and you can discard lands or the wrong card for better optons as well making this not card value, but card flow
The Black Gate was printed in The Lord of the Rings
Alright, so why am I talking about this wrestling move so much
Im going to quote Gavin Verhey from the article that I linked up above: Game Changers dramatically warp Commander games, allowing players to run away with resources, shift games in ways that many players dislike, block people from play, efficiently search for their strongest cards, or have commanders that tend to take away from more casual games
Add to that the second most potent card draw engine in Underworld Connections (second only to Jace, Architect of Thought into Sphinxs Revelation) and there are some rich incentives to cast black cards