I have travelled two weeks into the future to tell you:
Holy crap you guys is it really that hard to design a few damn spellcards in several months?!
If you only get crap, then present at least the crap you got. Maybe it is salvageable, maybe not, but at least you show us that you have DONE something.
There's plenty of ways to get inspiration:
Screw around with maths, especially trigonometrical functions.
Listen to inspiring music.
Play some other danmaku games.
Look at your character's design and abilities, look at related articles at wikipedia and gather flashy words, concepts and references for top-down design.
You don't have to craft the philosopher's stone here. Just make it difficult but fair without too much reliance on memorization, and you've got something.
Please.