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As a spell caster, when I am keeping a concentration effect up, does it require any of the casting components required to have cast it, such as verbal or somatic?

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Casting a spell is a different type of action to maintaining a spell, so no, there are none of the same requirements for components.

According to the magic rules for Concentration duration.

Concentration The spell lasts as long as you concentrate on it. Concentrating to maintain a spell is a standard action that does not provoke attacks of opportunity. Anything that could break your concentration when casting a spell can also break your concentration while you’re maintaining one, causing the spell to end. See concentration.

You can’t cast a spell while concentrating on another one. Some spells last for a short time after you cease concentrating.

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  • \$\begingroup\$ Mostly I was thinking about the sound or action. Its clear that someone if focusing on a spell or cant hide if they are doing those things. \$\endgroup\$
    – Fering
    Jan 29, 2018 at 2:24
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    \$\begingroup\$ @Fering That would make invisibility useless... \$\endgroup\$
    – Adeptus
    Jan 29, 2018 at 5:31
  • \$\begingroup\$ @Adeptus Invisibility is not a concentration spell, its a duration \$\endgroup\$
    – Fering
    Jan 29, 2018 at 13:04
  • \$\begingroup\$ Very few spells actually use Concentration as a duration - mostly illusions. \$\endgroup\$
    – YogoZuno
    Jan 29, 2018 at 20:43

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