aramis erak
Legend
of course.
it did 1d6+1 damage
not 1d4+1 like the later 1edADnD.
And it does not SAY it needs a roll to hit.
Supplement 1: Grayhawk - p. 22
Magic Missile: This is a conjured missile equivalent to a magic arrow, and it does full damage (2-7 points) to any creature it strikes. For every five levels the magic-user has attained he may add an additional two missiles when employing this spell, so a 6th level magic-user may cast three magic missiles at his target, an 11th level magic-user casts five, and so on. Range 15".
Supplement 2 allows Monks a save vs Spells to dodge.
AD&D 1E is clearer. AD&D 1E PHB 67
Use of the magic missile spell creates one or more magical missiles which dart forth from the magic-user's fingertip and unerringly strike their target. Each missile does 2 to 5 hit points (d4+1) of damage. If the magic-user has multiple missile capability, he or she can have them strike a single target creature or several creatures, as desired. For each level of experience of the magic-user, the range of his or her magic missile extends 1" beyond the 6" base range. For every 2 levels of experience, the magic-user gains an additional missile, i.e. 2 at 3rd level, 3 at 5th level, 4 at 7th level, etc.