When comparing changelings with no real utility, cheaper is always better, since their primary purpose is to fuel tribal support cards: Universal Automaton is way better than Chameleon Colossus, for example
There are also lots of effects that we don't allow at common, such as tutoring, reanimation, permanent control change, spell copying, etc
Its Vengeance Fletching attack deals 70+ damage, scaling with Ancient cards in the discard pile, while Speed Wing offers a potent 120 damage
Announced during Hasbros Investor Day stream, Magic: The Gatherings 30th Anniversary Edition is based on Limited Edition Beta, the card games second-ever print run released in October 1993
There are, of course, weaknesses to a mill strategy some players include cards that prevent themselves from losing to an empty library, like Ulamog, the Infinite Gyre
Self-control - Zubat can't be Paralyzed