Waters of the fade = lyrium? According to the origins codex on lyrium.
Excuse the brief post, I can't format while using this tablet >_>.
You know, I've been thinking about how lyrium connects to the Fade as well.
We know lyrium is the titan's blood, we also know that it lets non-dreamer mages explore the Fade, it also helps them restore their mana reserves (but at a price, since it creates a mana imbalance).
Why? Does lyrium have any connection to the Fade? Like titans, connected to the Fade, but dwarves are not since they are connected to the titans?
We can see lyrium veins in the Fade, is that because lyrium is just another part of reality (and thus Fade-lyrium is just a reflection) or is there a more profound reason to it?
I used to think lyrium is a physical manifestation of the Fade (before the Descent DLC) and now I wonder whether it's more complex than just blood of titans. What if the lyrium is magic, but magic of the waking world and the essence of the Fade is the magic of the dream world, and they share a connection, maintaining some sort of balance. The grounding properties of lyrium is what allows mages to explore the Fade (instead of being swept by its' current into a regular dream), what severs the Tranquil from the Fade and gives Templars the ability to dispel spells. It reinforces reality.
Justice says lyrium doesn't sing in the Fade, and yet Cole spoke about the time before the Veil, when everything sang the same, implying there was some sort of harmony before the Veil's creation. It also seems spirits and those touched by spirits are immune to lyrium's "toxicity", Justice wore the lyrium ring without any adverse affects and the seekers are immune to red lyrium (how much of their immunity is to lyrium and how much is to taint is something we can only contemplate over). I wonder what would've happened to post-possession Pharamond if he were to try enchantment or general handling of lyrium. He was a mage who was branded by lyrium and then touched by a demon, it is a similar process to what a Seeker goes through to gain their powers, but we don't know if it changed him (besides affecting his ability to control his feelings). I am also curious what would've happened if a spirit (of faith/compassion/etc.) was the one to approach him instead of a demon.
Another source of magic in Thedas is blood, according to Solas general use of blood magic makes it harder to enter the Fade, unlike lyrium (one of the side effects of mana imbalance from lyrium is lucid dreaming). What does that say about the connection between blood and the Fade? It was said the Old Gods taught humans how to draw magic from blood, which is interesting since the magisters were dreamers (does it mean they used lyrium to counteract the effects of blood magic?) and that blood magic can be taught from demons and allows the user to tear the Veil completely. We also know that a lot of blood shed weakens the veil. Between blood and taint there is a connection as well, blood magic can cleanse the taint.
To be honest, trying to make sense of it all fries my brain, I tried to describe the connections in a diagram but there are so many uncertainties:

The arrow I drew from blood -> Fade was the result of this logic:
What is the Veil? We know it's a vibration that repels the Fade but what kind of magic is it? We know Solas didn't practice blood magic, so is it lyrium-based magic or is it Fade magic? While lyrium is a good contestant, and vibrations do make me think about the lyrium's song I cannot imagine how its' grounding properties work with how abstract the Veil is. Also, the magic stored in Solas' orb, the one which bestowed the anchor upon the Inquisitor's hand and allows it to walk the Fade in a safe manner? Green magic. The anchor is also what allows the Inquisitor to study the rift mage specialization with ease, which in turn, gives the Inquisitor the ability to draw raw magic essence from the Fade.
Ugh, I'm so confused.