Conjuro literally translates to "spell" or "incantation," a word often associated with magic and enchantment.
In the song, Junior H uses this word metaphorically when he sings, "Pa' mí, tú eres mi conjuro" (For me, you are my spell). He's expressing that the person has a captivating, almost magical power over him, making it a very poetic and memorable way to describe intense attraction.
Junior H sets a scene that's hazy and hypnotic in "Psicodélica." The whole song is focused on one person in a club, someone who is clearly the center of attention. He notices that "Se que todos te miraban / Las mujeres te envidiaban" (I know everyone was looking at you / The women envied you), but he also sees that her happiness comes from dancing. The night is described as "Psicodélica" (Psychedelic), full of smoke and flashing lights, creating a dreamlike mood for this intense attraction.
The song gets more direct and a little wild as it goes on. He asks her to take off her heels so he can feel her closer and says, "Quiero que esta noche seas pa mí" (I want you to be for me tonight). Things escalate with getting soaked in champagne and him calling her a "nina mala" (bad girl). The lyrics get even more suggestive with lines like "Hay que subir a las nubes / Yo me bajo y tu te subes" (We have to go up to the clouds / I go down and you go up). It's a song about losing yourself in the moment with someone who feels like a magical spell, or as he puts it, a "conjuro" whose lips are "veneno mortal" (mortal poison).