I was going to post this yesterday but The Band got in the way and Adrienne beat me to it. Still, here's some power from St. Patrick's Breastplate:
I summon todayAll these powers between me and those evils,Against every cruel and merciless powerthat may oppose my body and soul,Against incantations of false prophets,Against black laws of pagandom,Against false laws of heretics,Against craft of idolatry,Against spells of witches and smiths and wizards,Against every knowledge that corrupts man's body and soul;Christ to shield me todayAgainst poison, against burning,Against drowning, against wounding,So that there may come to me an abundance of reward.
Christ with me,Christ before me,Christ behind me,Christ in me,Christ beneath me,Christ above me,Christ on my right,Christ on my left,Christ when I lie down,Christ when I sit down,Christ when I arise,Christ in the heart of every man who thinks of me,Christ in the mouth of everyone who speaks of me,Christ in every eye that sees me,Christ in every ear that hears me.
I arise todayThrough a mighty strength, the invocation of the Trinity,Through belief in the Threeness,Through confession of the Onenessof the Creator of creation.
What a mighty prayer and you can read the whole thing at Adrienne's Corner.
God bless and be safe,
LSP