Dragon's Skull

What appears to be the skull of a dragon rises from the ground and shoots a bluish white energy beam from its mouth before falling back into the ground

Roll a d20 and a d4. Divide the d20 roll by the d4 roll and then add the number the d4 landed on. That is the damage the beam causes.

Roll a d6 and if it's higher than 2, the spell hits

For every 2 levels above Lv 5. You can summon another Dragon Skull. The spell can only be used once a day, if you use it more than once a day you lose 5 hp for every Skull you summon before the 24 hour threshold of the previous one.

Once you past level 8, you can cast a pure blue beam which only affects moving things it hits.

Once you past level 9, you can cast a pure orange beam which only affects non moving things it hits.