Some payoffs care about the act of investigating, while others reward you for simply having or sacrificing Clues
It also comes with upside later on down the road: the ability to cast cards from the yard
I placed the blue dragon second on my personal list because I think it is an incredibly strong threat in the current metagame that is able to dodge most common removal spells such as Lightning Bolt and Prismatic Ending
Something that's a less risky draw and the ability to put land cards into your graveyard, like Shamanic Revelations , is a good replacement
Like Chaos Warp, its the sort of red card Id recommend picking up in quantities so that you can always have some
With just a few Lotus Petals, a Deathlace, and two of this goofy color hoser, you've just achieved infinite mana