Play a botanist wizard and flavor all your spells as plant magic. Longstrider? Vines wrap around your legs like an exoskeleton, making you faster. Shield? A flower bud on your person blooms suddenly, deflecting a blow. Lightning Bolt? Generated by static in spontaneous cotton fluff that makes you look like a death-dispensing sheep. Illusions? Caused by floating pollen, scattering light to create something unreal. Need some undead minions? Check out the Myconids and their Spore Servants, or maybe the Yellow Musk Creeper from 3.5
by that low-fantasy wizards logic Harry dresden is a high-fantasy wizard. Do you see that as an inconsistency or do you think the dresden files is really a slightly atypical high-fantasy series?