Pocketful of Vipers
School conjuration (summoning)
Level druid 3, occultist 3, ranger 3, shaman 3, witch 3
Casting Time 1 round
Components V, S, M (a snake scale and fang)
Range touch
Target object touched
Duration 1 hour/level or until discharged (D)
Saving Throw Fortitude negates (object); Spell Resistance no

You set a magical ward upon the object touched, which must be a container such as a pouch, bag, backpack, or pocket. If any creature opens the container without first speaking a command word, 1d3 summoned venomous snakes appear, slithering out of the container and attacking that creature for 1 round/level before disappearing. They attack other creatures only if they themselves are attacked.