Thought Space Athletics (TSA) uses "Test Blend Nerve" for a specific plastic blend used in some of their disc golf discs, particularly the Temple putter mold. Here's a breakdown of Test Blend Nerve:

Modification of Nerve plastic: Test Blend Nerve is a variation of TSA's standard Nerve plastic. It focuses on achieving a unique aesthetic effect rather than significant performance changes.

Grippy and smooth: Like regular Nerve plastic, Test Blend Nerve boasts a very smooth and grippy feel, providing excellent control and comfort during throws.

Slight visual difference: The key difference lies in the visual aspect. Test Blend Nerve incorporates light-colored "splatter" effects for an interesting aesthetic. This doesn't affect the flight characteristics of the disc.

Limited availability: Test Blend Nerve is typically a limited-edition run, meaning it might not always be available and may be sought after by collectors for its unique appearance.

In essence, Test Blend Nerve offers the same great grip and performance as standard Nerve plastic with an eye-catching visual twist. If you find a disc in Test Blend Nerve, you're getting a reliable disc with a unique look.