#4 The Undertaker was always a heel in his feud with D-Generation X

Arguably one of the greatest performers to ever grace the squared circle, the Undertaker's contribution to ascend SmackDown Live to where it is today can never be forgotten.
With the Phenom following a part-time schedule, his days as a professional wrestling have become limited now and the former World Champion's current feud with HBK and HHH could be one of his last before he pulls the curtain on an incredible career.
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His backstage promo with Kane on Monday Night Raw certainly brought some old memories back but his return to the blue brand has definitely confirmed that the Phenom was always portraying the bad guy in this feud.
Since the Dead Man carries a supernatural aura which is neither a heel nor a babyface, his recent promos have certainly gravitated more attention from the audience because of his lack of respect for both his opponents.
While many have been criticizing WWE for booking such a short segment with the Undertaker tonight, the Phenom was clinical in his approach and definitely warned the talented faction.