Vestiges of the Black Star

I'm planning a Dark Sun campaign in which one of the players is a genasi swordmage/warlock hybrid. The player wants to be able to gain vestiges that are built around primordials (such as vestige of Ilmeth and vestige of Shax), and while there are already a few I decided to go the extra mile and make a small selection of warlock spells thematic towards Timesus the Black Star since, well, he is supposed to have gotten killed at some point during Prince of Undeath.

Not featured is a spell that lets you summon a shard of Timesus, as well as generate black star fragments when bloodied that basically operate as necrotic bombs.

As always lemme know if they are too powerful/weak.