Ever since Sun Magic came out circa, what, 2010, it's been the hottest hot sauce of them all.
What I especially love about Sun Magic is that you apply it to a card like a treasure card and suddenly that spell takes on a new life, and there's nothing more awesome than applying a Colossal Card to a low-level spell along with a Sharpened Blade on a regular blade charm and WHAM!
. . . all of a sudden a wimpy little Vampire card is hitting in the thousands. If you would have shown me fast hits with Sun magic cards back in 2009, I would have been blown away . . . and I think we all were and still are in love with these cards. Using those little four pip AOE spells like meteor combined with all that Sun Magic goodness are a favorite trick of Uber Wife. :) And because of that alone, Sun magic on low level spells gets the official stamp of awesomeness from me!