A lot of that value is tied up in lands like Sunbaked Canyon and Stormcarved Coast, which contribute to some of the best precon mana bases weve ever seen
These decks include red splash blue deck wins, counter burn, UW weenie, UB fairies style agro control and various mono blue creature decks with things like vedelkan shackles, grand architect and opposition
Of course, Karmic Guide's real potential is when you use it alongside Reveillark, which returns two creatures with power two or less when it leaves the battlefield
Part of your World and Hades Lord of the Underworld allow you to return characters from your discard pile to your hand
Since most people are pulling their Ravenous Chupacabra for Murder and Eternal Witness for Regrowth, that means this is more likely to get triggered, and it does so each turn, so if Foe A casts a non-creature spell on their turn, they take two, and then on Foe Bs turn if they cast Sun Titan and Foe A casts Counterspell, they take another 2 damage