(disclaimer: not 100% sure about this ruling. I wrote this yesterday and ended up removing it, but I'll update the answer if someone corrects me)
As far as I understand the interaction, Blazing Strike changes only the weapon's normal damage type to Radiant when you hit a creature, but it doesn't affect any extra elemental damage from the weapon's special properties.
As for the second (this is my main doubt), since Sneak Attack uses the weapon's damage type, and that type is changed for the hit, it would become Radiant.
EDIT: some threads in case they help get a better answer:
2 questions about Boon of Blazing Dawn, the ability Blazing Strike:
1st: weapon damage like dragon wrath, with 2 types of damage: can you change to radiant also elemental weapon damage?
2nd: can you change additional damage on the attack like sneak attack?
Thanks!
(disclaimer: not 100% sure about this ruling. I wrote this yesterday and ended up removing it, but I'll update the answer if someone corrects me)
As far as I understand the interaction, Blazing Strike changes only the weapon's normal damage type to Radiant when you hit a creature, but it doesn't affect any extra elemental damage from the weapon's special properties.
As for the second (this is my main doubt), since Sneak Attack uses the weapon's damage type, and that type is changed for the hit, it would become Radiant.
EDIT: some threads in case they help get a better answer:
- Vicious pact weapon damageVicious pact weapon damage
- Vicious weapon damage type with elemental cleaver
- True Strike (2024 Radiant Damage ) + Sneak Attack question?
- DAMAGE TYPES of True Strike and Shillelagh 2024 combo