The blank template for the contest going on at
The X-Men icon is for X-men and New Recruits.
The Brotherhood icon is for Brotherhood members.
The Acolytes icon is for Acolyte members.
The Morlocks icon is for Morlocks.
The Unaffiliated icon is for mutants without a team-- Angel, Mirage, Apocalypse, etc.
The Humans icon is for human characters.
The Items icon is for items-- Kurt's Holo Watch, Juggernaut's Helmet, Webber's Computer, etc.
The Location icon is for locations-- The Mall, The woods, Bayville High, New York City, etc.
The Energy Icon is to denote energy costs.
Want to make up a new icon? Feel free! Have fun making up your own cards.
See examples of each here