Asking dead people to take your prayers to God? Then Jesus didn't have to die, just have the dead intercede for us!
Speaking to the dead is necromancy, and that's not okay. Did Jesus pray to the dead? No, He prayed to the Father. We are to pray to the Father in the name of Jesus, our Great High Priest, the ONLY intercessor we ever need. Going through anyone else is not only speaking to dead idols but it robs God of the glory due Him alone.
0“There shall not be found among you anyone who makes his son or his daughter pass through the fire, one who uses divination, one who practices witchcraft, or one who interprets omens, or a sorcerer,
11or one who casts a spell, or a medium, or a spiritist, or one who calls up the dead.
12“For whoever does these things is detestable to the LORD; and because of these detestable things the LORD your God will drive them out before you.
Deuteronomy 18:9-12