pokemon card backside Every Back Design [Complete List] Top 5 Pokemon Card Back

Removal is an umbrella term to describe cards that get rid of opponent's cards after they've been cast , and blue has plenty removal to go around

Honda, Sumo Champion exploits that design to its fullest by making your Giant Ox hit like a Colossal Dreadmaw

Psychic Frog Psychic Frog from Modern Horizons 3 is a cool little callback to Psychatog

Heralds Horn lets you pick a creature type when it comes into play, granting a static reduction of one generic mana to their casting cost

I feel like that's a missed opportunity right there

The earliest set didn't exactly have story or lore tied to it, but the idea, the general fantasy, is that you and your opponent are magicians or sorcerers or wizards who draw power (or mana) from the lands