The latter is limited to only one card and allows for additional cosmetics like backdrops, while the former is more of an album of cards you put together with a theme or cosmetic purpose in mind
Once per turn, when a Spell/Trap card is activated: Target 1 monster your opponent controls
1: Exile another target permanent you own, then return it to the battlefield under your control
Ultimately, if you find a design you like at a website like Altered Sleeves, that might be the way to go
Regardless, it's good to know that Magic is a game that can both be a place where professionals play and collect cards for tens of thousands of dollars and a game to make people laugh and have fun with their friends
Strangely, we already have a five-color legend that cares about Sagas in Tom BombadilTom Bombadil, and I would argue that Tom is better than Terra for Sagas specifically