#5 The Lord of Darkness
After getting buried alive, The Undertaker returned as a darker version of himself. He went Gothic and embraced his magical side. His druid outfit looked great, serving as a pretty drastic change at the time. Undertaker became more and more fearsome as the Lord of Darkness.
While the Deadman transition helped 'Taker expand his range in WWE, this iteration of him helped him blossom as a top-level performer. Some of The Undertaker's most memorable moments came during this phase of his career, which lasted until the Attitude Era.
We saw the birth of Hell in a Cell, as Undertaker had two legendary matches inside the satanic structure against Shawn Michaels and Mankind respectively. Both of them are memorable for their own reasons.
It was also during this era when The Undertaker's half-brother, Kane, made his WWE debut. Their storyline was special, even if the matches may not have been. Undertaker truly blossomed as the Lord of Darkness, having some great matches and winning some titles along the way as well.