A power's range indicates how far from you it can reach, as defined in the Range entry of the
power description. A power's range is the maximum distance from you that the power's effect can occur, as well as the maximum distance at which you can designate the power's point of origin. If any portion of the area would extend beyond the range, that area is wasted. Standard ranges include the following.
Touch: You must
touch a creature or object to affect it. A
touch power that deals
damage can score a critical hit just as a
weapon can. A
touch power threatens a critical hit on a natural roll of 20 and deals double
damage on a successful critical hit. Some
touch powers
allow you to
touch multiple targets. You can
touch as many willing targets as you can reach, but all targets of the spell must be touched in the same round that you manifest the power.