Call it (Death’s rush: increases movement speed by 50%, but also damages you for 4% of your health (eating part of your bloodsheild and other absorbes first)
(Animation: Death Knight oozes a pool of blood behind them leaving it temporarily in their wake)
Operates similar to warlocks burning rush but eating absorbs first for the sake of tanking, not really sure where it would be placed in the tree, but I feel like dk movement speed is lacking a little outside of wasting deaths advance or wraith walk to get to the next mob or walking back if your group wipes