Which tank has the most expensive ability?

Tanks only. Mana costs at rank 1. Champions who pay with energy, fury, rage or anything else are left out, because those aren't the same currency.

• 1

  Alistar Unbreakable WillR

  100
• 2

  Amumu Curse of the Sad MummyR

  100
• 3

  Blitzcrank Rocket GrabQ

  100
• 4

  Braum Glacial FissureR

  100
• 5

  Cho'Gath FeastR

  100
• 6

  Galio Hero's EntranceR

  100
• 7

  K'Sante All OutR

  100
• 8

  Leona Solar FlareR

  100
• 9

  Malphite Unstoppable ForceR

  100
• 10

  Maokai Nature's GraspR

  100
• 11

  Nautilus Depth ChargeR

  100
• 12

  Nunu & Willump Absolute ZeroR

  100
• 13

  Ornn Call of the Forge GodR

  100
• 14

  Poppy Keeper's VerdictR

  100
• 15

  Rammus Soaring SlamR

  100
• 16

  Rell Magnet StormR

  100
• 17

  Sejuani Glacial PrisonR

  100
• 18

  Singed Insanity PotionR

  100
• 19

  Sion Unstoppable OnslaughtR

  100
• 20

  Skarner ImpaleR

  100
• 21

  Tahm Kench DevourR

  100