Font of Radiance
Prerequisite: 21st level
Benefit: When you score a critical hit with a power that has the radiant keyword, the target begins to glow brightly (save ends).
The target’s space and all squares adjacent to it are illuminated by bright light. Invisible creatures become visible while they are in affected squares, and attack rolls against creatures in those squares take no penalty for concealment. Any foe that ends its turn in an affected square (including the original target) takes 3d6 radiant damage.
Does the target I made a critical hit against that is being affected by the font of radiance power get to save before being affected by the damage? End of turn effects are chosen in order by the enemy.
In addition, if the target does take 3d6 radiant damage and if he is already vulnerable to radiant by another source... do I gain the extra damage from Pelor's Sun Blessing with the following property?
Property: If you deal damage to a target that has vulnerability to radiant damage, you deal extra damage equal to your Wisdom or Constitution modifier, whichever is higher.