Of course, if you can get Brago, King Eternal to survive to attack and deal combat damage, resetting all of your Sagas is going to be a cascade of Chapter 1 effects that is going to create some serious advantages
Then you can spend two mana to exile two cards to make a 2/2 tapped Zombie token, so she's a token maker at instant speed
Of course Spawnsire of Ulamog has a more real upper limitation in Constructed formats where youre limited by the number of cards in your sideboard, but either way pressing the big shiny button with a 20 on it should win you the game on the spot
You wont see this creature type printed on creatures (perhaps because theyre too good at hiding), but keep in mind that creatures with the changeling ability are Cowards
A 1-toughness 3-drop creature is a difficult ask, and a 2-toughness 5-drop is even less workable
Since it only costs one mana more than Naturalize, and green is the color with the best mana acceleration, Krosan Grip can replace Naturalize in virtually every mono-green deck , and you'll never feel the difference until split second wins you the game