ForbidenMaster
Explorer
The sleep keyword means that any monster immune to sleep is immune to the sleep spell and other future spells that have the sleep keyword, but not all effects that cause you to become unconscious.
So just from a quick look through of the MM, Constructs would be immune to sleep, but would be effected normaly by a rogues Knockout.
Also, note that the only two class powers that make a character become unconscious besides sleep, dont have the sleep keyword and both explicetly state that the unconscious character wakes up if it takes damage. IMO this gives even more evidence to the fact that the sleep spell, or more specifically any power with the sleep keyword, is magical sleep that can only be broken with a save.
So just from a quick look through of the MM, Constructs would be immune to sleep, but would be effected normaly by a rogues Knockout.
Also, note that the only two class powers that make a character become unconscious besides sleep, dont have the sleep keyword and both explicetly state that the unconscious character wakes up if it takes damage. IMO this gives even more evidence to the fact that the sleep spell, or more specifically any power with the sleep keyword, is magical sleep that can only be broken with a save.
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