Need idea for spells

So I'm making an RPG with Teh.fellow and we need spells for classes (ofcourse), I have some spells already but I get stuck at the Rogue/Ninja/Samurai class, so if anybody would have an idea, TELL ME! :D

Shuriken: Throwing a shuriken which damages all units in line (has 1000 range) and comes back to the caster damaging again all units in its' line

Spiral throw: Throws several knives in the form of a spiral outwards, damages all units touching the knives

Sounds like very cool spells, do u also have any idea how to make them?

I think there are some examples in the spell section. For the Shuriken, its called boomerang.
Anyway, some suggestions.
Pledge of Honor: The Samurai pledges his honor and gains a sudden boost in skill, granting bonus damage. Each kill increases the bonus damage up to a cap.
Swallow Dance: Jumps into the air and slams the ground at the target point. The samurai then slides for a short distance and is then granted bonus movement speed.
Hawk Step: Moves around the target like a hawk hunting its prey. After a few seconds, the samurai charges to the target and slashes it continuously.

Ninja spell:
Stealth: Same with Wind walk spell
Jump: You can download Here
Assassinate: You must in wind walk mode to use this ability. Attack target unit from behind and deal bonus damage.
That's my suggestion