Your speed can only increase by one each turn, and once you have four speed, you achieve max speed permanently
We joke about internally having a storm scale, with storm itself being the most powerful keyword we would ever put on a card
The primary combo is using Solemnity alongside Nine Lives or Phyrexian Unlife to keep yourself alive, but it also pairs well with a non-human, Phyrexian Altar and Mikaeus, the Unhallowed for infinite mana
Many creature cards have both a "species" creature type and a "class" creature type
To make everyone's lives easier, it's called "Mega Evolution" and is kicking things off with a bang thanks to Mega Lucario, Mega Gardevoir, Mega Venusaur, Mega Absol, and more
Mystic Confluence manages this handsomely