So this is clearly designed for one deck archetype, Life Gain, which is the third biggest archetype ever played, and it makes sense in +1/+1 counter decks that have the occasional lifelink dork or Commander or something that gains you life here and there like Akoum Refuge, and then if you have a Selesnya colored power matters build this would help there with things like Anthem effects
You love sacrificing Silver Myr or Birds of Paradise for two beaters late game or two ETB triggers to do again like Mulldrifter and Flametongue Kavu mid-game
Fantasy stories are uniquely predisposed to showing off cool weapons, and thats especially the case when its a video game property where weapons and gear are part of the power-up progression experience
While you technically lose loyalty to activate them, a typical 4-loyalty planeswalker will be able to activate their -1 four turns in a row without any setup, which in an actual game of magic is very close to forever
MTG: Final Fantasy Play Booster Pack A crossover decades in the making enter the Multiverse of Final Fantasy