The tension that Phyrexian Arena generates in Cubes with reasonable aggressive decks leads to some of my favorite games of Magic
There are cards that are rare because they were printed long ago, like Talas Warrior, or several of the pricey commons from Portal Three Kingdoms , that carry significant prices despite being totally undesired across all formats
Gratuitous Violence doubles the damage dealt by a controlled creature
Averna, the Chaos Bloom Averna, the Chaos Bloom offers a potent ramp effect each time you cascade
16 MB onboard flash memory for storing games: More than enough to store multiple game backups, thanks to the small size of official titles and homebrew
You also have things like Eye of the Storm and Swarm Intelligence, which dont technically give storm but still create lots of spell copies in their own wild ways