The systems, per the books

Magic in the world

The maesters would tell you magic is a dead thing, a comfort for fools. The maesters have not been beyond the Wall lately, nor to Asshai, nor watched a candle of Valyrian glass burn without heat in their own Citadel. Here is the working taxonomy — one card per craft, ordered against a rising tide.

The systems

Magic in the books is not one power but many crafts, most of them quickening again with the return of dragons. Spoiler-veiled cards cover events past the ranging and the War of the Five Kings.

How does magic work in Game of Thrones?

There is no single system. The books present magic as a set of separate crafts — skinchanging, greensight, blood magic, shadowbinding, pyromancy, glamors, fire-resurrection — each with its own rules, costs, and traditions. What they share is a link to the return of dragons: as dragons come back into the world, the old powers grow stronger.

Is magic getting stronger in the books?

Yes, and the text is deliberate about it. The pyromancers admit their wildfire spells hold better than they have in generations; the glass candles of the Citadel have begun to burn again after centuries dark; sorcery bites harder across the world. The turning point is the return of dragons — magic waxes with them.

What is blood magic in ASOIAF?

Blood magic is among the oldest and darkest crafts in the books, worked through sacrifice and the power believed to reside in blood. Mirri Maz Duur's ritual is one documented working: she warns that only death may pay for life and exacts a life under terms with devastating consequences. Other blood magic is not shown to obey one proven universal rule, and its mechanisms and costs remain uncertain.

Are the Faceless Men magical?

Partly. The Faceless Men of Braavos change faces using real faces they harvest and preserve, bound up with a fierce discipline of the self — closer to a sacred craft than a spell. That is different from a glamor, which is true illusion-sorcery: a charm, often anchored to a ruby, that wraps a false seeming around someone.