Dragon Mage is highly costed, but could make for some interesting plays, especially in some wild jank mill decks
Thats crazy
Doing so saves them from being vulnerable and exerted during your opponent's turn
Card not found, on the other hand, is the basis for a deck in Modern (its namesake actually) and played in Legacy Storm decks (maybe Vintage as well, I dont know the format enough to say)
The Beta set is especially notable for its inclusion of Magic: The Gatherings Power Nine - a series of nine cards featured in the card games early Alpha, Beta and Unlimited sets that are widely considered to be the most powerful Magic: The Gathering cards ever made
Positive loyalty taps a creature, negative loyalty draws cards based on the number of tapped creatures an opponent controls (hello, mass tappers), and the emblem turns your maximum hand size infinite and (optionally) returns anything that hits your graveyard to your hand