I like the prayers of the Bible that begin with “May the God of …”. Paul’s prayer of this sort at Romans 15:5-6 is about God creating unity and together praise Jesus Christ. Here are some more prayers like this of a blessing sort:
May the God of hope fill you with all joy and peace as you trust in him, so that you may overflow with hope by the power of the Holy Spirit (Rom. 15:12).
May the God of peace, who through the blood of the eternal covenant brought back from the dead our Lord Jesus, that great Shepherd of the sheep (Hebrews 13:20).

Eli answered, “Go in peace, and may the God of Israel grant you what you have asked of him.” (1 Sam 1:17)
David went out to meet them and said to them, “If you have come to me in peace, to help me, I am ready to have you unite with me. But if you have come to betray me to my enemies when my hands are free from violence, may the God of our fathers see it and judge you” (1 Chron. 12:17).
May God himself, the God of peace, sanctify you through and through. May your whole spirit, soul and body be kept blameless at the coming of our Lord Jesus Christ (1 Thess. 5:23).
Listen now to me and I will give you some advice, and may God be with you (Exod. 18:19).
May God give you of heaven’s dew and of earth’s richness— an abundance of grain and new wine (Gen. 27:28).
May God Almighty bless you and make you fruitful and increase your numbers until you become a community of peoples (Gen. 28:3).
May God be gracious to us and bless us and make his face shine upon us, Selah (Ps. 67:1).