Golden Wave of Wrath

A pool of white and orange heat begins to puddle under your feet. The heat and vapors cause you to gently rise about a foot above it as you watch it form underneath you. When it forms you are floating on top of a wave of fury and flame measuring 20 feet wide, 10 feet high, and 5 foot thick. Any creature within 5ft of the wave must make a Dex save equal to your spell DC or it takes 3d8 dmg immediately or half dmg if they pass. You sit atop boiling fury and can ride atop of it in tidal wave fashion in any direction according to your movement speed. Anything entering or passing through it must make the same saving throw or take 3d8 fire dmg. You sit atop of it until you next turn. Any creature starting its turn inside in it, must make another Dex save or take 1d8 fire dmg. If you are hit while on top of the wave, you fall into it taking 2d8 fire dmg, then the wave disappears.