Not only (and some argue the condemnation Necromancy is only as regards occult practice), but despite the Holy Spirit inspiring the recording of approx. 200 prayers in Scripture, and with multitudes of angels for believers to pray to before the Lord's resurrection, and additional multitudes of ascended OT saints after, there is not one single prayer by any believer to anyone else in Heaven but the Lord. And which is what instruction on prayer to Heaven addresses, (Mt. 6:9) and to whom the Spirit cries ("Abba, Father," not Mama, Mother). And with the risen Lord Jesus being the only Heavenly intercessor, (1Tim. 2:5) and by whom they have direct access into the holy of holies in Heaven, and who is immediately accessible and supremely able to sympathize and enable believers to walk in victory. (Heb. 2:17,18; 4:15,16; 7:25; 10:19) To God be the glory.
All of which is to say that we have been given the full counsel of God through His holy word. Those who would impose strange and novel doctrines and dogmas upon God’s own under threat of excommunication for not accepting them unquestionably are calling God’s word into question and causing others to doubt its sufficiency. We are reminded to not go beyond what is written. That is a safe and secure place to be - under the shadow of His wings.