Auras have been around forever, but theyve always presented a design problem
Reki, the History of Kamigawa Reki, the History of Kamigawa rewards you with card draw just for casting your best cards
Years later, after a lot of bittersweet sentiments, Mewtwo EX doesn't hold the same unrivaled prestige it once did - but some players still think the card is viable for deckbuilding
A lot of your cards will be able to crew this and so yeah, it is just an overly good card that fits neatly into this archetype
Some give flying, deathtouch, +1/+1 counters, hexproof, double strike, vigilance, haste, mana generation, sacrifice abilities, etc
When we got ourselves in those situations, my writing professor suggested having us make the character do the most extreme thing we could think of