Command Demon

based on which demon summon, the [class=9] get 1 spell replaces Command Demon:

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• Summon Imp: Cauterize Master
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• Summon Voidwalker: Disarm
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• [spell=712]: Whiplash
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• Summon Felhunter: Spell Lock
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• [spell=30146]: Felstorm
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if using [spell=108499], based on which demon summon, the [class=9] get 1 spell replaces Command Demon:

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• [spell=112866]: Cauterize Master
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• [spell=112867]: Disarm
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• [spell=112868]: [spell=115770]
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• [spell=112869]: [spell=115781]
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• [spell=112870]: [spell=115831]
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if using [spell=108503], based on which demon sacrifice, the [class=9] himself get 1 spell replaces Command Demon:

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• Summon Imp: Singe Magic
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• Summon Voidwalker: Shadow Bulwark
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• [spell=712]: Whiplash
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• Summon Felhunter: Spell Lock
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• [spell=30146]: Pursuit
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I can finally delete that ugly macro I made that was designed to do exactly this

For those (PvP) warlocks who are using Grimoire of Sacrifice or those who still have the Felhunter summoned, and want to have an on demand counterspell, the following macro works. However when creating the macro, you will have to shift+left-click the Command Demon spell out of your spell book, AFTER you have sacrificed your demon (felhunter) for those using the Sacrifice talent. If you're going actively use your pet, be sure to right click the spell off on your pet bar so it doesn't auto cast. Id assume this macro would for any variant of the Command Demon spell, but I specially made this for focus target counterspells in pvp.

This macro will Spell Lock your focus target if one exists If a focus target does not exist, it will Spell Lock your current target. Reminder: Spell Lock is castable on any target within Line of Sight, 360 degrees from the caster and inside the 40 yard range.

#showtooltip Command Demon
/stopcasting
/cast [target=focus , exists] Command Demon
/cast Command Demon

At the time of this posting, I can not get the proper spell Command Demon morphs into to show via the #showtooltip [in this example its Spell Lock ]. If you place in Spell Lock for the #showtooltip the button will grey out and addons such as omniCC will not put a cooldown timer on it. The macro still works but you get no cooldown timer. If you chose to use your own icon (Id recommend the Spell Lock Icon personally), you will still get the Command Demond tooltip but the cooldown timer and macro still function.