Ring of Arcane Focus (5e Equipment)
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Ring, very rare (major) (requires attunement by a spellcaster)
This silver ring has bands of black metal wrapping around it, and a vibrant purple gemstone in the middle. While wearing this ring, you have advantage on saving throws to maintain concentration on a spell. In addition, when you cast a spell that has a duration other than instantaneous, you may triple the duration of that spell.
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