Candle of Summoning

This black candle burns with an eerie, green flame. The candle's magic is activated when the candle is lit, which requires an action. When lit, the candle sheds bright light in a 5-foot radius and dim light for an additional 5 feet. Each creature in the candle's light has advantage on Constitution saving throws to maintain concentration on conjuration spells. After burning for 1 hour, or if the flame is magically or nonmagically snuffed out, it is destroyed. Alternatively, when you light the candle for the first time, you can cast the spirit guardians spell (save DC 15) with it. Doing so destroys the candle.