Did you know that WotC produced four sets designed to help people learn to play Magic
Snapcaster Mage The runner up for today is none other than Snapcaster Mage, the strongest of the Magic Invitational Cards designed by MTG champions
All four "dragonic" Types would eventually be associated with each other starting with "Xeno Meteorus", a monster that locks the player out of Summoning monsters of other Types from the Extra Deck if Special Summoned by its own effect
Any drawn monster with an Attribute equal to 1 of the shuffled monsters is Special Summoned to the field, but their effects are negated and their ATK/DEF become 0
Nashi, Moon Sages Scion + Ink-Eyes, Servant of Oni Rat ninjas are fun, especially the ones from the first Kamigawa block
While my main deck wasn't geared to deal with the mirror, it was built so that I wouldn't be at a disadvantage