Chandelier of Urza

You conjure a magnificent spectral floating chandelier made of seven shimmering candles in an unoccupied space within range. The chandelier illuminates a 30-foot radius and showers the area in dim light. You can use your bonus action to move the chandelier up to 30 feet. Any creature within the illuminated area has advantage on Wisdom (Perception) checks, Additionally : 

• Whenever a creature rolls 7 for a hit, it is considered a critical hit and one candle is extinguished .
• Whenever a creature rolls 7 on a damage dice, they add 7 fire damage to the roll and one candle is extinguished.
• Whenever a creature rolls 7 on a saving throw, they gain 7 temporary hit points and one candle is extinguished .

Once all candles are extinguished, the caster rolls on the wild magic table and the chandelier disappears.