I've always loved the look of line art created with wood engraving techniques, associated with artists such as Albrecht Durer, Thomas Bewick and others. I also like the look of linocut printing, even though it typically doesn't have as much fine detail.
Here are some cool powered handheld tools which could be used for the purpose of carving end grain wood blocks, linoleum blocks, etc. for relief printing:
EK Success Inscriblio: This appears to be the least expensive option. Battery powered, and more portable, but on the flip side, I suspect that it's considerably less sophisticated than the other two units shown here in terms of various bits and suitability for fine detail. Still, it might be useful for certain applications.
Turbo Carver II: More expensive than the Inscriblio, but less expensive (I believe) than the 400 XS.
SCM 400 XS