I found this unofficial ruling on Searing Blood, but it doesn't make sense to me. To sum up the question and the answer (in case of link rot):
Q: Does the damage dealt by Searing Blood's delayed trigger cause Satyr Firedancer to trigger?
A: No. The damage is dealt by a delayed trigger, which is not an instant or sorcery.*
The delayed trigger clearly says that Searing Blood deals 3 damage. Searing Blood is an instant. Therefore, I think Satyr Firedancer should trigger. Can someone explain why Satyr Firedancer would or would not trigger?
This question was prompted by a related one.
* The judge reversed the ruling, but was kind enough to leave notes about it. Keep in mind that the paraphrased quote above reflects the original ruling.