In an absolutely genius move, they have based the decks on the four most popular entries in the Final Fantasy series
You can sacrifice a 2/2 dork or bigger
Each land in the cycle enters untapped if you control a basic land a very easy requirement and then taps for its respective colour
Between these threats and more complicated kinds of value engine, discard decks are able to successfully leverage an uneven war of attrition and tempo: drawing enough cheap spells to continuously trade for and neutralise the opponents draws, while also grinding steadily towards a more permanent victory
A fairly safe option that can take out small characters, and works as a Shift target for Mickey Mouse Playful Sorcerer in Broom decks
The magical ink used to summon Glimmers come in six types: Ruby, Amethyst, Emerald, Sapphire, Steel, and Amber