So, one of the spellcasters in my group wants to cast invisibility on the thief to have him scout out a dungeon.
The Players Handbook doesn't specifically say the caster must be in sight range of the target and there is a little bit of debate between group members on whether the caster needs to maintain sight range to maintain concentration on the spell, or whether it just works no matter what (checks willing) for an hour.

  • \$\begingroup\$ Related: Can you maintain concentration on a spell from another plane? \$\endgroup\$ May 27, 2015 at 2:47
  • \$\begingroup\$ What exactly do you mean by site range? Do you mean Line of Sight, the spell's range, or both? \$\endgroup\$ May 27, 2015 at 2:52
  • \$\begingroup\$ Let's say. No line of sight. The invisible character is in a castle less than 300 yards away. There is no written range for invisibility. The caster is outside the castle concerning on the invisible character. \$\endgroup\$
    – L4NC3RJ
    May 27, 2015 at 2:54
  • 6
    \$\begingroup\$ Invisibility would be an exceedingly useless spell if concentration required Line of Sight. \$\endgroup\$ May 27, 2015 at 2:58


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