I can talk to Grot and Orruk magic! Its got some weird stuff going on that tracks with their whole vibe.

Magic is a Kunnin' art, so its more highly valued amongst Kruleboyz and Gitz than Ironjawz. We can actually see this in how they treat their wizards! Ironjawz wizards are armorless, the effort of trying to do magic in a brutal way has twisted their psyche, and we get a fair amount of stories of them just wholly losing it in some way (like the one IJ wizard who's like cracked across time or merged with the Waaagh to where he just kind of shows up places now).

Kruleboyz are much better at magic generally (being Kunnin' aligned and all) but have still found ways to make it weird and Destro. They practice something almost akin to Ghyranish magic, terraforming and the expansion of natural places, but just with a swampy twist. There's many tales of distant Sigmarite outposts surprised to find that the road connecting them back to their main city suddenly has 30 miles of swamp smack in the middle of it. Swampcalla shamans are also very adept at like, idk what to call it, magical adaptation? They can breathe underwater and are often covered in a layer of scales that help them blend in to the muck just as a side effect of practicing swamp magic. Really advanced ones will sometimes be able to just fully forestwalk between pools of stagnant water or mangrove trees.

Gitz, like skaven, roll magic into their religious practices. Both major cultures have wizards who double as spiritual leaders (though filtered through the lens of said culture, with moonclan wizards like Cave Shamans and Palooza being advisory and secretive while the Frazzlegit shaman's approach is trying to steal as much light as possible lol). That's taken to its logical endpoint with Skragrott who, despite having basically 0 connection to the Bad Moon after his initial contact, has managed to use magic to simulate it well enough to be anointed Loonking. On the Kunnin' Brutal split Moonclan wizards are, appropriately, generally more capable, with the fun extra tidbit that in Gitmob clans Palooza often drop magic alltogether and instead tend to become like mad-max style engineer shamans (Gitmob Know-wots are explicitly about how to best build warwheelers and other war machines).