What kinds of "active" mitigation would you like to see among tanks?

[HanakoTheGoth]

Edge of Twilight 60-90 second cooldown- creates a black barrier around the dark knight. Granting 30% Damage Reduction from both magical and physical damage. also every time take a hit you siphon life from your attackers (hence damage) also gain the buff "Endark" meaning all your attacks and skills will deal additional 5% dark damage top of the damage they already do, also this ability causes large amounts of enmity when used

Cloak of Darkness for 60-90 second cooldown - For 12 Seconds Dark Knight gains "Blink" All physicals attacks, and physical attack skills will result in a miss. only damage dark knight while cloak is active is from magical attacks . also every time you miss an attack you gain large amounts MP back