Black Hole Sun

As you raise your hands to the sky and chant the incantations, you turn the sun into a black hole sun.

all light from the black hole sun is giving off for only one round before it vanishes. The black hole sun makes all terrain harsh terrain. every turn the black hole sun is still active, all creature need to make dexterity saving throws or be dealt 40d10 Force damage + spellcaster modifier .

if this spell is casted as a ritual (By offering 200 gold and 1 vial of the casters blood), the caster is immune to all effectives of the blackhole sun (expect the darkness) and the spell lasts for 59 minutes longer.