It's essentially negative ramp, but you gain a bit of card advantage
The sky and water are rendered beautifully and even reflect onto Greninja in subtle ways, most notably on its hands and head
You can organize your cards by set, type, rarity, or value there
Finally, you have a wide selection of nonlegendary creatures that can be revived in Junds colors, allowing you to either give away a conventionally powerful creature like Balefire Dragon, or something hugely detrimental like Leveler
Sometimes because of their collection value, sometimes because newer cards might be in better condition, and sometimes for the very simple fact that theyre cooler (ie, the art)
Because Jodah's deck has access to all colors and thus all effects and a variety of spells, can find the card and effect for any situation