I recently used this in a priest book against my buddy's water wizard, and after a crazy long game I won. Turns out I've never really thought much about ToD. It just kinda sat there to boost temple of light. And in many cases i see most books abandon it all together.  But I think the priest benefits much more from ToD as he's likely to be taking more hits. Re rolling damage dice can be huge even if you dont have  defence.
So I wonder what the limit to its utility would be, it's obviously not replacing HoBS for pre erratta spamability. But the cost is low for a thing that lets you re roll a defence, that's super useful. Even the damage re roll can be clutch.
I'm thinking about a force master opening that drops 2 of these first turn in starting zone and adjacent one. Then puts on an extra defence and grabs her buddy or her Galvitar (haven't decided on everything yet). The temples can keep you safe and they are about the same mana investment as a big spawnpoint would be, my fear is that they rely too much on chance and that you could get totally burned with bad re rolls.
Out of school i dont think ive ever seen it played. Its 4 sp for non priests, thats not a huge investment. its not that squishy either, and i dont believe it required LOS to work (please correct me if im wrong here).
I'm starting to ramble, what do you think about this potentially awesome temple?

Edited for clarity* I was on my phone previously.