Invisibility is more than transparency; it can potentially make something impossible to detect through any means. Questions about how it works, when to use it, and what can be done to stop it fit in here.

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What happens when an invisible creature is detected?

From the PHB, Appendix A on Conditions: INVISIBLE An invisible creature is impossible to see without the aid of magic or a special sense. For the purpose of hiding, the creature is heavily ...
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What happens when Detect Magic is used upon something that is magically invisible?

Does a simple casting of Detect Magic reveal the presence of magical invisibility?
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When a creature is invisible, but not hidden, do the enemies know the location of the creature?

When a creature is invisible but not hidden, one could argue that the players still know it's general location. If a creature becomes invisible and not hidden does it remain on the battle-mat?
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Can an invisible creature be flanked by surrounding it?

If you have an invisible creature totally surrounded on all sides (and know for practical reasons it can't escape), like this: … are all those surrounding it flanking it?
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Do you need a Ranger's Feral Senses to have positional awareness of invisibile creatures?

In D&D 5e, the description of hiding (PHB p177) says an invisible creature needs to stay quiet and otherwise avoid leaving signs of its passing, while the "invisible" condition (p291) says the ...
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Can you cast Invisibility on a large box and hide inside?

What happens if you cast invisibility on a chest or closet that weighs no more than 100 lb./level and then put some items inside it (and close the door)? What if you put a living creature and not ...
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What happens when I'm invisible and something I'm wearing has Light cast on it?

The bard in my group cast the light spell on an amulet he was wearing. Then after triggering a trap, he cast invisibility on himself. What happens in this situation? The amulet is now invisible but ...
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Does Blindsight detect invisibility?

Blindsight is described as using your other senses to detect your surroundings. Now, if someone invisible walked into my blindsight zone, would I be able to detect him, because he is only hidden from ...
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Do occupied squares increase Tumble DCs for an invisible creature?

Inspired by flanking the invisible. (Every creature is size/reach 5ft./5ft.) Picture this: The invisible creature, say Eveanthia the Elven Rogue under the influence of Greater Invisibility, wants ...
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If you make a ranged touch attack with an ongoing, visible spell can you benefit from being invisible?

The spell Defenestrating Sphere (Sor/Wiz 4, Duration: 1 rd./level) allows for a ranged touch attack as a move action: When you cast this spell, you create a violently swirling sphere of air. As ...
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Does Aid Another Break Invisibility?

When using the Aid Another action, does it break invisibility? I'm inclined to say no, because you're not actually attacking a creature, you're making an attack roll against a flat AC of 10. Aid ...
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Does Invisibly Sneak Attacking a target with Tremorsense leave them Flat Footed?

I need to know how tremor sense works with sneak attack and invisibility. Normally when a something is invisible they have no problems walking upto someone else and getting a sneak attack. The thing ...