When I first added that trope to the main page I added only a couple examples, but I've had the chance to do a little dedicated listening and note-taking. Here's what I came up with. I'm posting it here to give other fans a chance to add things they've noticed.
That said, there's a lot here, and I have some some concerns about just putting it in the main page; I'm considering a subpage, possibly unique in title, possibly just Awesome Music.
"Bloody evolution"
- "This Will Be The Day" (vol 1)
- "All Things Must Die" (vol 5)
"Roses"
- "Red like Roses" (Red Trailer)
- "Red like Roses Part II" (vol 1)
- "Maybe red's like roses?", "When It Falls" (vol 3)
- "Like the smell of a rose on a summer's day", "Gold (Acoustic)" (vol 5)
- "A rose will grow", "Rising" (vol 6)
"I/She Burns"
- "Yellow beauty burns gold", "Red Like Roses" (Red Trailer)
- All of "I Burn" (vol 1)
- "I am the golden one who burns just like the sun", "Armed and Ready" (vol 4)
- "I'm on fire today", "Ignite" (vol 5)
- "I'll burn like the sun", "Gold (Acoustic)" (vol 5)
- "I'm on fire", "Big Metal Shoe" (vol 6)
"Shadows"
- "Black the beast descends from shadows", "Red Like Roses" (Red Trailer)
- "From Shadows" (Black trailer)
- "You don't know what it's like to live in shadows", "Like Morning Follows Night" (vol 4)
- "Rise up from shadows and into the light", "This Time" (vol 5)
- "Thought that I could pull you from the shadows", "All That Matters" (vol 5)
"I'm/She's Cold"
- "White is cold", "Red Like Roses" (Red Trailer)
- "The girl's ice cold", "Dream Come True" (vol 2)
- "I'm cold", "Cold" (vol 3)
- "Years of scorn will leave you cold", "Mirror Mirror, Pt. II" (vol 3)
- "The cold/Seems to grow in my soul, it's consuming me", "Path to Isolation" (vol 5)
- "Frozen and stuck/Too lonely, it chills to the bone", "Path to Isolation" (vol 5)
"Moon shattered/crumbled/gone"
- "When the moon is gone", "I May Fall" (vol 1)
- "Shattering the moon", "Die" (vol 2)
- "Soon the moon is bathed in black", "When It Falls" (vol 3)
- "And the moon should crumble", "Gold (Acoustic)" (vol 5)
"Mirror"
- "Mirror, mirror" (White trailer)
- "Truth will rise/Revealed by mirrored eyes", "Sacrifice" (vol 2)
- "Mirror Mirror, Pt. II" (vol 3)
- "Mirrors will shatter", "When It Falls" (vol 3)
- "Mirror, can you hear me?", "This Life Is Mine" (vol 4)
- "there's a part of me that stares back from inside the mirror", "This Life Is Mine" (vol 4)
- "I'm shattering the mirror", "This Life Is Mine" (vol 4)
- "Mirror mirror, now we're done", "This Life Is Mine" (vol 4)
- "Looking in the mirror/I see someone that I don't recognize", "Path to Isolation" (vol 5)
- "Mirror, what's this thing I see? ... Mirror help me, who am I?", "Path to Isolation" (vol 5)
- "Mirror mirror who will lose it all?", "Big Metal Shoe" (vol 6)
"The Day I/We Have Waited For"
- "This will be the day we've waited for", "This Will Be The Day" (vol 1)
- "The day I've waited for is drawing near", "It's My Turn" (vol 3)
Legends, fairy tales, etc.
- "a fairytale ... Legends scatter", "This Will Be The Day" (vol 1)
- "Legends and fairy tales scattered in time", "Divide" (vol 3)
- "It used to feel like a fairy tale", "Let's Just Live" (vol 4)
- "Back to the fairytale", "The Triumph" (vol 5)
- "Legends have scattered", "All Things Must Die" (vol 5)
- All of "Big Metal Shoe" (vol 6)
"Royal test"
- "White is ... burdened by the royal test", "Red like Roses" (Red Trailer)
- "Burdened by your royal test/I will not surrender", "This Life Is Mine" (vol 4)
Scattering - refs Summer Rose's cenotaph ("Thus kindly I scatter...")
- "But they're all scattered now", "Red like Roses Part II (duet version)" (vol 1)
- "Legends scatter", "This Will Be The Day" (vol 1)
- "Legends and fairy tales scattered in time", "Divide" (vol 3)
- "Legends have scattered", "All Things Must Die" (vol 5)