Asphyxiate is a level 55 Blood ability and level 60 Unholy talent for death knights.
- Patch 7.0.3 (2016-07-19): Now a baseline ability for Blood and talent for Unholy. No longer acts as a silence against targets immune to stuns.
- Patch 5.2.0 (2013-03-05): cooldown has been reduced to 30 seconds (was 1 minute).
- Patch 5.0.4 (2012-08-28): Added.