heavy wizardry: n. Code or designs that trade on a particularly intimate knowledge or experience of a particular operating system or language or complex application interface.

:heavy wizardry: n. Code or designs that trade on a particularly
intimate knowledge or experience of a particular operating system
or language or complex application interface. Distinguished from
{deep magic}, which trades more on arcane *theoretical*
knowledge. Writing device drivers is heavy wizardry; so is
interfacing to {X} (sense 2) without a toolkit. Esp. found in
source-code comments of the form "Heavy wizardry begins here".
Compare {voodoo programming}.
-- The AI Hackers Dictionary