Editing Warhammer 40,000/Tactics/Necrons(8E) (section)

===Sky of Falling Stars===
Pick 3 enemy units within 18", and roll 1d6 for each; Tesseract Vaults subtract 1 from each roll. If the result is ''less than'' the number of models in the unit, they suffer 1d3 mortal wounds. An unmodified roll of 6 always fails.

This is better than Antimatter Meteor if you can get within 18" of two units with 5 or more models. This is great for C'tan in many circumstances, it's more circumstancial for Tesseract Vaults because the -1 only really applies against smaller units.