My question here revolves around when and how much information does a player or creature gain about an aura or zone, once they are affected by it.

Do those affected know exactly what effects are applied to them in game terms?

Other than by a knowledge check or having a companion affected by it, can a player learn the game term effects of a zone or aura before they are affected by it?

Or do you hide the precise terms of a aura or zone if possible from the players?


1 Answer 1


Once you are affected by an aura (or any other effect) you should know what happens when you are in it. Whether your character knows that in precise game mechanical terms your players should know. How they choose to reflect that knowledge in their PCs depends on the level or realism in your game.

(some characters know they just lost 5 hp, some PCs may just know they got hurt).

From PHB1 p 57

Whenever you affect a creature with a power, that creature knows exactly what you've done to it and what conditions you've imposed.

You might hide things like (using knowledge checks as an avenue to reveal them, or reveal them as the effects take place)

  • If there is a way to stop the aura
  • Secondary effects that aren't immediate
  • Other effects that fail to affect the current PC.

It's a bit underhanded to not tell PCs exactly how they are being effected unless it is serving a higher narrative purpose that is revealed fairly quickly.

  • 4
    \$\begingroup\$ Agreed. What my DMs usually do is wait until the effect starts before it is revealed. For example, starting your turn in the aura doing damage. But never actually telling BEFORE the effect starts. This way, some can't Meta out of the issues. \$\endgroup\$
    – zapoqx
    Commented Jun 11, 2012 at 19:24
  • \$\begingroup\$ @zapoqx it's helpful give a hint that there might be an aura, but definitely not reveal anything beyond super basic descriptors before the effects actually take place. \$\endgroup\$
    – wax eagle
    Commented Jun 11, 2012 at 19:28
  • \$\begingroup\$ @wax eagle ya. It is helpful, but the aura is usually not shown until the effect happens. If its like Difficult terrain, we'll know the aura at the moment of stepping into it (and now we know aura 2 for example). Its just something that seems to work for us. \$\endgroup\$
    – zapoqx
    Commented Jun 12, 2012 at 19:41

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