Spellsinging

Too Wyrd Spoiler

I pulled the pouch with the sigils out of my pants and set them between us. I began humming a song we were both familiar with. Joseph quickly joined in, finding the rhythm from the song.
I reached out with my mind, searching for the spell to sing. I could tell by the way Joseph closed his eyes that he was doing the same.
“Sigils hiding,” I began. “Where monsters can't find.” We repeated the line a few times.
“Seek them only in Nicola's mind,” Joseph added the second line. I glared at him, but we repeated the two lines together.
“Beyond the world, outside the tree,” I said, giving the third line.
Joseph didn't even pause to repeat the whole thing before he added the last line. “Past all the boundaries, so mote it be.”
We sang the chant again, repeating it over and over, embracing the beat of the words, visualizing the sigils disappearing.
Joseph picked up a melody in his chanting. After a few repetitions, I began a counterpoint.
My eyes closed and my body swayed to the rhythm. We could feel the power building up. Our song picked up speed, but kept the rhythm.
“Sigils hiding...” My body moved in a circle, swaying counterclockwise. I could feel the power getting closer to the point of release, like the feeling of an orgasm approaching. “Beyond the world...” The energy was nearly at the peak.
“So mote it be!” We shouted the final words, releasing the spell.

Spellsinging is a form of spellcasting in which energy is created and drawn through singing, chanting, harmonizing, etc. This is an effective way of quick spellcasting, as it cuts through the need for additional ritual or symbolic items.
Basic tunes and harmonization between multiple spellcasters forms the basis of the spell. The tune only needs to have the right emotional feel for the spell. Simple is often better here.
The rest is about lyricizing the need, which is most easily and commonly done with rhyme. It helps to be able to rhyme on the spot.

Applied Restriction

The only restrictions are in wording and tune.