So in the sentence below what would be the grammar function of 炎でも?

> 遥か彼方で炎でも燃え盛っているように、紅蓮の光は形を変え、踊る。

I can understand the overall meaning, but I am struggling with how to phrase
this part.
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2022-05-23T17:05:53.003
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question
grammar particle-でも
The function of "demo" in the following sentence: 遥か彼方で炎でも燃え盛っているように、紅蓮の光は形を変え、踊る。