The Undertaker. The Deadman. The Phenom. The moral conscience of the WWE.
Whatever you want to call him, the demon of Death Valley has done it all in WWE.
WWE Champion. World Heavyweight Champion. Tag Team Champion. Hardcore Champion. Royal Rumble winner. Multiple time WrestleMania main eventer and so much more.
Throughout his near 30-year career in WWE, Undertaker has feuded with some of the all-time greats, from Hulk Hogan to Stone Cold, to The Rock and John Cena.
And though there have been countless victims who have ended up on the receiving end of a Tombstone Piledriver, not everyone has fallen to the Phenom's wrath.
Some Superstars have dared to face off against the former World Champion, only to send the Phenom packing.
Here are five WWE Superstars that The Undertaker has never beaten in his illustrious career.
5: 'Macho Man' Randy Savage
As two of the most recognizable stars in all of wrestling, it's shocking to think that the Macho Man Randy Savage and The Undertaker never had a real feud.
Their one and only showdown as part of the WWF came in the early 90s as part of tag team action.
With Savage teaming with 'Hacksaw' Jim Duggan, and the Phenom aligning with Jake 'The Snake' Roberts, the match was an all-out brawl, but one that saw Duggan and Savage emerge the victors.
The only other times where the pair met in the ring came during Royal Rumble matches.
In 1993, Undertaker was eliminated by Giant Gonzalez, whilst the Macho Man would be the last man eliminated by Yokozuna, in just another little victory for Savage over the legendary Phenom.
4: The Ultimate Warrior
If there's one thing critics of The Undertaker like to bring up, is that he often rarely lost.
And if there's one thing critics of The Ultimate Warrior like to bring up, is that he often rarely lost.
So when these two behemoths squared off, you knew things were going to get rough!
Meeting at the legendary Madison Square Garden, the pair met in a bodybag match, a match similar to the casket match but with a different finishing spot.
After a hard fought match, it would be the Warrior who emerged the winner, though the bodybag match has been forgotten to history, perhaps because of how ridiculous it looks.
After all, these were two 300+ lb megastars, battling for a lengthy period of time to shove the other in what was essentially a sleeping bag.
3: Sheamus
Sheamus joined the WWE main roster in 2009, nearly 20 years after the Deadman, so it may come as a surprise to many that these two have squared off.
Meeting in the Summer of 2010, the Celtic Warrior was riding high after winning his second WWE Championship, though faced a monumental obstacle on the dark match after the 900th edition of RAW.
Meeting both the Deadman and John Cena, in a steel cage no less, it seemed that the Champion was sure to fall to the two established legends.
Fortunately for the future Bar member, Sheamus was in the right place at the right time.
With Cena locked in the Phenom's Hell's Gate submission, the Irishman scrambled to the door to escape.
Not the most honorable of wins, but who else can claim they beat both Cena and Undertaker on the same night?
2: Chyna
Debuting in the WWF in 1997, Chyna was a true pioneer.
The so-far only female Intercontinental Champion, the ninth wonder of the world was also the first woman to enter a Royal Rumble match.
Another accolade you may not know: Chyna has defeated the Deadman.
Squaring off on the August 9, 1999, edition of RAW in a triple threat match that included Triple H, Chyna was able to score the biggest win of her career.
Pinning the Game after some help from a certain Rattlesnake, the recently inducted Hall of Famer may not have beaten 'Taker per se but was the winner of a match he lost.
A huge main event for a huge show, as that night also saw the debut of a new rookie in WWE, by the name of Y2J Chris Jericho.
1: Roman Reigns
Ever since being thrust into the main event picture in 2014, Roman Reigns has become one of WWE's most enduring top-stars.
Entering the 2017 Royal Rumble, Reigns was already a three-time WWE World Champion and added another feather to his cap by eliminating the legendary Phenom from the show's 30-Man match.
Facing off in the main event of WrestleMania 33 it was the Big Dog who once again emerged the victor, handing Undertaker his second ever loss at the showcase of the immortals.
This wasn't even the first time that Reigns beat the sure-fire Hall of Famer, as the pair met on a 2013 edition of SmackDown when the Shield took on Undertaker and Team Hell No.
With two wins and an elimination under his belt, it seems the infamous yard truly belongs to the Big Dog now.