Patches for racks. And then go make tracks! RE-XT 1 is a rack extension patch refill for Reason 7 and up with 270 patches for Polysix, Pulsar, PX7 and Redominator.
RE-XT 1 offers combinator patches with magnificient tweakability. The Pulsar patches are made in a modular synth fashion so that the advanced LFO unit actually becomes playable; however, it behaves in most peculiar ways which means you will get sounds out from it that you probably have never heard from Reason before.
The patches offer experimentation and playability in a perfect mix. A whole new world of sounds.