The 'Database' category consists of two types of decks: Decks that are still viable within the current cEDH landscape, but are not impactful enough on the larger scale to be featured on the Main Page
Chain of Vapor has a ton of targets in a multiplayer game, and the option to keep sacrificing lands to keep bouncing nonlands is tempting
Because you cannot win until you don't lose!
Clive, Ifrit's Dominant / Ifrit, Warden of Inferno Let's start with draw cards equal to your devotion to red, this is reason enough to go heavy red, the bit about discarding your hand will either feed your discard payoffs, won't matter by the time you cast Clive, Ifrit's Dominant, or you're doing red wrong
Conduit Pylons I talk about this in the Arid Archway section, but the ability to control the top of your deck is huge