Redoubt

From wow.incgamers.com

Talent: Redoubt
Effect: Damaging melee and ranged attacks against you have a 10% chance to increase your chance to block. Lasts 10 sec or 5 blocks.
Statistics: Rank 1 = +6% block, Rank 2 = +12%, Rank 3 = +18%, Rank 4 = +24%, Rank 5 = +30%.