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Ambrose's injured left arm, but Ambrose rammed Regal into the ring post to badly disorientate him. Then, Ambrose ruthlessly kneed Regal's head into an exposed turnbuckle, causing Regal to bleed from the ear; the match was then ruled a no contest. After the match, Regal stared down Ambrose, then applauded him and turned his head to allow Ambrose to hit him with the Knee Trembler. Afterwards, the FCW locker room stormed the ring to separate Ambrose from a fallen Regal while commentators questioned whether Regal would ever be able to wrestle again. Ambrose made his main roster debut on November 18, 2012 at the Survivor Series pay-per-view alongside Roman Reigns and Seth Rollins, where they assaulted Ryback during the triple-threat main event for the WWE Championship, leading to CM Punk pinning John Cena to retain his title. The trio declared themselves "The Shield" and vowed to rally against "injustice". They denied working for Punk, but routinely emerged from the crowd to attack Punk's adversaries, including Ryback, The Miz, Kane and Daniel Bryan, who had attempted to save Kane. This led to a Tables, Ladders, and Chairs match being set up for the TLC payper-view pitting the three men of the Shield against Ryback and Team Hell No (Kane and Bryan), which Ambrose, Reigns and Rollins won in their debut match. The Shield continued to aid Punk after TLC; during Punk and Ryback's TLC match for the WWE Championship on the January 7 episode of Raw, they attacked Ryback, which resulted in Punk retaining his title. During the Royal Rumble event where the Rock challenged for Punk's WWE Championship, match, a blackout occurred and the Rock was
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