The ability to find any equipment you want on turn two and be ready to play and attach it on turn three is already great, but Cloud has another ability: As long as he's equipped, all triggered abilities of his equipment and himself trigger an extra time
Once Essence Channeler has been blocked by a creature without flying or reach, losing life to give it flying and vigilance won't cause it to become unblocked
Played as a standalone card, its not very good but the ability to represent a lot of threats without additional mana investment makes me think that this has a very high ceiling
Harkening back to Delver's old Treasure Cruise days, the Devil gives mid- and late-game Delver players a way to refuel and reload after running out of steam
Null Profusion Neither this card nor the original, Recycle, which was color shifted to black in Planar Chaos for Null Profusion, is played that much in EDH