At the end of the Damage Step, if this card battled an opponent's monster: Inflict damage to your opponent equal to that opponent's monster's ATK, and if you do, banish that monster
That might sound like a lot of protection, but think of it like this: If your deck is completely shut off when the commander or a similarly critical piece isnt in play, your opponents can beat you with a Swords to Plowshares or two

Mime Psychic Illustration Rare 180/165: Omanyte Water Illustration Rare 181/165: Dragonair Dragon Illustration Rare 182/165: Venusaur ex Grass Ultra Rare 183/165: Charizard ex Fire Ultra Rare 184/165: Blastoise ex Water Ultra Rare 185/165: Arbok ex Darkness Ultra Rare 186/165: Ninetales ex Fire Ultra Rare 187/165: Wigglytuff ex Colorless Ultra Rare 188/165: Alakazam ex Psychic Ultra Rare 189/165: Golem ex Fighting Ultra Rare 190/165: Kangaskhan ex Colorless Ultra Rare 191/165: Jynx ex Water Ultra Rare 192/165: Zapdos ex Lightning Ultra Rare 193/165: Mew ex Psychic Ultra Rare 194/165: Bills Transfer Trainer Ultra Rare 195/165: Daisys Help Trainer Ultra Rare 196/165: Erikas Invitation Trainer Ultra Rare 197/165: Giovannis Charisma Trainer Ultra Rare 198/165: Venusaur ex Grass Special Illustration Rare 199/165: Charizard ex Fire Special Illustration Rare 200/165: Blastoise ex Water Special Illustration Rare 201/165: Alakazam ex Psychic Special Illustration Rare 202/165: Zapdos ex Lightning Special Illustration Rare 203/165: Erikas Invitation Trainer Special Illustration Rare 204/165: Giovannis Charisma Trainer Special Illustration Rare 205/165: Mew ex Psychic Hyper Rare 206/165: Switch Trainer Hyper Rare 207/165: Basic Psychic Energy Energy Hyper Rare

Backing this fact up is the Dream League [SM11b] logo in the cards bottom-right corner
The first thing to do is identify what kind of curling you see
Only 18 copies of the valuablye card were produced for the tournaments, although an extra two were printed for the tournaments in 2008, and 126 copies were made for a promotional event in 2009