What started the rivalry between undertaker and batista?

Answer 1

it started with wm23. batista earned a chance to face taker at wm23 and he lost the world heavyweight championship and it became 15-0. then he wanted a last man standing match at backlash 2007. it was a draw kuz batista speared both of them through the entrances. then sometime in may, there was a steel cage match for the championship. and both mens feet touched the ground at the same time so it was a draw. then at cyber Sunday, the world heavyweight championship was on the line and stone cold Steve Austin was special guest referee. and undertaker lost but idk wat happened after that but i do know dat at wm24 it was edge and undertaker and world heavyweight championship on the line and edge tapped out to the new submission and taker won the world heavyweight championship and it became 16-0