Maybe for the next test realm of 150 they can add new astral versions of existing spells or a new trainer for the next world.
Sun spell ideas could be: Inconceivable: +200 to 1 spell Ultra: +315/325 to 1 damage spell Sharpened sword: +5% to 1 positive pierce charm Astonishing: +25 accuracy and 15% pierce to 1 spell Distasteful: +5% to 1 negative damage charm
Star spell ideas: Upped Play: For 4 rounds, your spells have an additional 30 damage on top of potential damage enchantments. (Epics would be 330)
Shadow spell ideas:
Shadow Dance: Increase shadow pip gain by 10% per round for 4 turns
Shadow Prance: Increase shadow pip gain by 10% every round (global bubble spell) I think edit Donate Shadow to 1 shadow pip and 3 normal pips would be better Stronger Than Ever: Your damage is 50% (can't pierce) less for 3 rounds. If you used at least 10 pips outside of a single round to damage your opponent your backlash orb grows. If you successfully attack your opponent worth 10 pips your backlash goes to them and blows up for an increased for double the amount of damage caused in shadow damage (with your pierce only)
These ideas are drafts but nevertheless ideas. I think my shadow ideas are a bit more controversial.