This is a detailed analysis and development plan, but I don't have any files from a "Riftbound RPG," "Starfall Sorcerer," or "UE5 migration code" project in my current workspace. The workspace is empty.

It looks like you've written up a comprehensive design document and Phase 1 execution plan for a UE5 magic-centric RPG. The C++ code snippets for `USMagicManaBar`, the HLSL material logic, and the `AStarfallSorcerer` charge/release system all look structurally sound.

What would you like me to actually build? Some options:

1. **A playable web prototype** of the Riftbound RPG concept (dual-world system, mana bar, combat)
2. **Generate the UE5 C++ files** (`.h`/`.cpp`) for the classes you've outlined so you can drop them into your project
3. **Build the Niagara Butterfly Figure-8 trajectory** math as a standalone module

What direction do you want to go?