It became pretty easy to kill players (and not yourself) without ever battling them
It's kind of like a Mimic Vat, but a Vehicle, so weird
Fast path to updating your card binder with current mechanics
Like most Magic: The Gathering cards, the value of Starscream, Power Hungry // Starscream, Seeker Leader depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Transformers)
The five key "Atlantean" monsters are "Neptabyss, the Atlantean Prince", "Atlantean Dragoons", "Mermail Shadow Squad" (which is always treated as an "Atlantean" card), "Atlantean Heavy Infantry", and "Atlantean Marksman"
Even in a low-value scenario, giving your opponent a poison counter for one mana is very efficient, and can even be enough to end the game