A beautiful prayer that I absolutely love praying is the called "Prayer of Ismael". The spirits love this prayer and the energy is very strong when it is prayed. Below I have recorded the prayer for you in Portuguese. Here the English prayer to read.

Prayer of Ismael
Glory to God in the highest; peace to men on earth!
Jesus, good and beloved Master,
Sustain your humble, sinning brothers in the battles here on earth.
Blessed angel of the Lord, open for us Your compassionate embraces
Protect us from evil
Lift our spirits to the Majesty of your Kingdom,
And infuse in all our senses,
The light of Your immense Love.
Jesus, through your sublime sacrifice,
through your martyrdom on the cross,
Give to those who find themselves burdened with weighty clothing -
Give to them the perfect orientation of the path of virtue -
The only path that can let us find You.
Jesus, peace to them,
Forgiveness to our enemies
And receive in Your blessed breast
The prayer of the least of Your servants.
Blessed Star, Lighthouse of the Immortal "phalanges",
Purify us with Your Divine rays;
Cleanse us of all our guilt;
Attract us to move close to Your breast,
The blessed sanctuary of all love.
If the world, with its errors, passions and hates,
Strews the path with needles,
Darkening our horizon with clouds of sin,
brighten more with Your forgiveness,
In order that secure and aided in Your message
We can overcome the difficulties of the way
And reach the dwellings of Your kingdom.
Friend - Star - Lighthouse of both sinners and the just,
Open Your Divine breast
And receive our supplication -
For all humanity.
Let it be thus.

The Prayer of Caritas is a prayer that is well known in all spiritual centres in Brazil. This is a strong prayer that is used to purity our soul and as protection. “Caritas” (“Charity”) was a spirit that communicated through the medium Madame W. Krell who lived in Bordeaux, France, and was one of the most important writing (psychographic) mediums in the history of spiritism. Caritas dictated the prayer to Madame Krell who channelled the prayer on the night of 25 December 1873.  It is believed that Caritas was the incarnation of Irene in a previous life. Irene was burnt at the stake in Rome in the year 305. She was later canonised and known as Saint Irene.
Here is the prayer in English for you to enjoy:

Prayer of Caritas
God, our Father, who is all power and goodness,
give strength to those who go through tribulations;
give light to those who seek the truth,
and fill the human heart with compassion and charity.

God, give the guiding star to the traveler,
consolation to the afflicted,
and rest to the sick.
Father! Give repentance to the guilty,
truth to the spirit,
guidance to the child and a father to the orphan.
Lord! May your goodness extend over everything that You have created.
Mercy, Lord, to those who do not know You
And hope to those who suffer.
May Your goodness allow the consoling spirits
to spread peace, hope, and faith everywhere.
God! A ray of light and a spark of Your love can inflame the Earth.
Let us drink from the fountains of this abundant and infinite goodness,
and all tears will be dried,
and all pain will be lessened.
A single heart, a single thought will rise to you,
like a cry of gratitude and love.
Like Moses on the mountain, we await for You with open arms.
Oh! Goodness, oh! Beauty, oh! Perfection,
and we wish in some way to deserve Your mercy.
God! Give us the strength to help progress so we may rise up to You:
give us pure charity;
give us faith and reason;
and above all, give us the simplicity and the humility that will make of our souls
a mirror in which your divine image will be reflected.