Incendeia comes from the verb incendiar, meaning to ignite or set on fire. It's a strong, dramatic verb that goes far beyond something ordinary like "excites," giving the lyric a burning, almost uncontrollable intensity.
In the song, Cristiano Araújo sings "Seu instinto me incendeia" ("Your instinct ignites me"), using the word to describe how completely consumed he feels by desire, as if the other person's presence were literally setting him on fire.
"Além da Lenda" turns a lover into folklore. Cristiano Araújo sings about a woman who shows up unannounced and takes over: "Ela sempre aparece do nada" ("She always appears out of nowhere"). He casts himself as her prey, hunted under a full moon, and lets her devour him without resistance — "Vem me devorar, adoro o jeito louco de me amar" ("Come devour me, I love the crazy way of loving me"). By the chorus he has stopped fighting it, admitting he does not want to wake from the dream: "Além da lenda, se é sonho eu não quero acordar" ("Beyond the legend, if it's a dream I don't want to wake up"). It plays less like a love song than a surrender.