Balanced?

[Aneximines]

Black Creature Bolt {B}
Instant (sorcery?)
Target creature gets -0/-3 until end of turn.

Black Player Bolt {B}
Instant (sorcery?)
Target player loses 3 life.

Black Incinerate {B}{B}
Instant (sorcery?)
Choose one - target player loses 3 life; or, target creature gets -0/-3 until end of turn.


Astral Projection {U}{U}
Sorcery
Remove the top ten cards of your library from the game, then draw two cards.


Thran Battery {1}
Artifact
{T}, sacrifice ~this~: Add two colorless mana to your mana pool.


Puff of Smoke {U}
Instant (rare)
Cycling: {0}
(well, okay, I know this one's unprintable )


Are these cards balanced? Overpowered? Broken?

 

[Oversoul]

None of them seem to me to be too terribly overpowered--except Puff of Smoke, which is totally broken.