A guy on reddit asked about favorite card addictions and this one has mine - Kairos and Rebuild.
I have played some iteration of this deck for the last 6 months to a year. It's not always relevant (especially when aggro is the most frequent like at the beginnings of months), but it is almost always fun. It holds its own well against other midrange and control decks and it has a lot of nifty interactions that take a while to learn how to sequence. The hit to Grodov's Burden recently was sad, but this deck still works with the change. The buff to Heart was, conversely, quite nice. Chronostorm is there for the inscribe or the aggro early. If they get rid of your Kairos, there are a few other big winners - Inferno Den, Talir + charge, Grodov + Gnash. Against Control a single Bhodi and Rox can mean a win against your opponent.
Have fun!