Calling this the blue Doom Blade might be going a bit far, but it’s not completely unreasonable. Blue has had effects like Pongify and Rapid Hybridization for a long time, and this card is certainly cut from the same cloth: an instant that replaces a creature with a (hopefully) weaker vanilla creature. Is the extra mana worth making the creature a 2/2 rather than a 3/3? My gut tells me no, and unlike something such as City of Death, I think this card is overhyped and therefore overpriced at $6.