If you can squeeze a 2/2 flier through for damage, then Gnawbone is really a 5 mana dragon
To be clear, though, the two are very different cards and the main (only) resemblance is the mana cost and power and toughness, but even still Im a believer in Walking Ballista
This two mana artifact enters tapped, it doesnt untap on your untap step, and at the start of your turn you can choose to skip your turn, untapping the Time Vault
Unfortunately, it's a bit too cumbersome to really punish decks in formats where multiple copies of cards are allowed, but it'll definitely show those Hare Apparent decks who's boss
Once that reflexive trigger resolves, the effect will finally occur
Blue is the color of counterspells and card draw, making it a popular choice for control players