Well of Radiance

When you cast this spell, you open yourself to the embrace of your chosen Deity, Patron, Oath, or other Divine source, and channel its power through you, as you plunge a sword of pure Radiance blade down into the ground.

A vertical pillar of golden Divine Light emanates from the sword projecting a Well of Radiance in a 10-ft Radius Cylinder around it for up to 3 Rounds. While inside the light of the Well, you and any allies within it deal an extra (3d8)+SM Fire damage and have Advantage with Attacks, while Attacks from targets outside the circle have Disadvantage, and you are Resistant to All damage from targets outside the circle. Enemies entering the Well must Succeed a CON Save Throw equal to you Spell Save DC or take (3d8)+SM Radiant damage and become Blinded while within the Well and for 1 Round after leaving it on a Failed Save, and Half damage and are not Blinded on a Success. The Well remains where you cast it for the duration, until the spell ends.

SM=Spellcasting Modifier.

 At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, increase the damage by (1d8)Fire and (1d8)Radiant for each slot level above 4th level.