If you get targeted by Blade Lord Ta'yaks Unseen Strike, you get stunned for about half a second before being hit. The stun seems to wear off milliseconds before delivering the damage, so you can blink out the damage area. Glyph of Blink is not required. However, I only managed to test this once, so it would be nice if someone could confirm that this works reliably.
Since Unseen Strike splits dmg amongst everyone he hits, I don't advise blinking out as it will cause the rest of your raid to take more dmg, unless you're suggesting that the dmg is still somehow split to you but avoided?