Candle of Communion

This black candle burns with an eerie, violet 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 necromancy spells. After burning for 1 hour, or if the candle's flame is magically or nonmagically snuffed out, it is destroyed. Alternatively, when you light the candle for the first time, you can cast the speak with dead spell with it. Doing so destroys the candle.