Move Help.

[Kenpachi Zaraki]

They generally like charge time (if any), what it looks like, how much damage it does, how many targets it effects, can it be used while moving etc. It looks like you've got it pretty much down, I'd just note the damage it does and how draining or how many times it can be used in succession and if Riku has to stand still to cast. Generally something like "medium damage to the target and a few feet around them" is good, not real numbers. As for travel, just something like "moves slowly" or "rockets toward the target" is good.

For comparison, my Fira spell:

Fira (Ranged Proficiency, Area Attack Proficiency)
An intermediate black magic spell, Fira consists essentially of a fireball about the size of a softball. By channeling mana into one’s hand, the user can generate said fireball, requiring around 3 seconds of time to do so. Vincent typically executes this attack while moving, lobbing the orb as one would a grenade. Upon contact the sphere detonates, with everything within a 6-foot radius sustaining splash damage from the resultant pyrotechnics as well as knocking back those nearby. As the attack is essentially thrown, the accuracy of the attack falls as the user speeds up, requiring the user to be nearly motionless to hit anything more than a stationary target. Those closer to the point of contact sustain higher damage, whilst those on the outer limit are mildly singed.

Yours would obviously be different, but yeah.