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Magic weapon
artificer attack 1

Target: one creature

Attack: Intelligence + 1 vs. AC

Hit: 1[W] + Intelligence modifier damage. Each ally adjacent to the user gains a +1 power bonus to attack rolls, and a power bonus to damage rolls equal to the user's Constitution modifier or Wisdom modifier, until the end of the user's next turn.
Level 21: 2[W] + Intelligence modifier damage. +2 power bonus to attack rolls.

Magic weapon is a 1st-level artificer at-will attack power. It is a weapon attack that, on a hit, deals damage comparable to a basic attack, and also grants adjacent allies a bonus to attack and damage rolls. The bonus to damage rolls is either Constitution or Wisdom based.[EPG:47]

The December 2009 update changed the bonus to ally damage rolls from an untyped bonus to a power bonus, to limit damage bonus stacking.[U :12/2009]

Characeter optimization groups rate this as a mandatory power, due to the bonus accuracy, being versatile in its use. It operates with any weapon.[Char-op artificer]