I'm imagining it's very symbolic, and ergo not standard. It's a Life of Kindling.

Meaning, instead of bestowing a specific virtue upon her, it courses through her like a spark through a fuse. It burns through her nose, ignites her chest, and blazes through her paws into the ground below. Her heaven is lit up, pale orange like a flickering flame, and it spreads into the darkness until the stars alight like embers.

I've been using orange for Skypelt mostly to color-theory compliment the blue I use for Silverpelt, but now I'm having a thought that maybe the reason for that is because their heaven is warm and fiery because of this.

My thought is that they needed a continuous piece from the First Battle's lifegiving in order to do this magic ceremony. Literally like "passing on the torch". So Firestar giving up one of his lives, which have been passed in an endless line from Bluestar back to Thunderstar, is symbolic.

Silverpelt is cold, blue and white. Skypelt is warm, orange and cream.