*Buy Cathartic Reunion cards on TCGPlayer and eBay Cut Bitterthorn, Nissas Animus for Bag of Holding Bitterthorn is a respectable ramp piece, but its three-mana investment is too slow for the current meta
The primary takeaway here, for me, is that Kaseto was a more successful implementation of what the previously discussed Karlov of the Ghost Council, a commander that really cracks open a new archetype and wants its own deck
Effects that modify a creature's power and/or toughness, such as the effect of the ability granted by Idolized, will apply to the creature no matter when they started to take effect
Is it better? Nope it sure isnt Well is it at least as good? Nope! Is it in the vein of at least tap stuff down for no mana like Opposition? Nope! Is it a frustrating reprint in Blue of Winter Orb or Rising Waters? Nope! But you say its repeatable and an engine
According to Mark Rosewater, they did that on purpose for Tarkir: Dragonstorm (because, as of late, the MTG Play Design team tends to avoid flashback on instants)