Reverence

Reverence is the white-coated warhorse of King Anduin Wrynn. Reverence is descended from a stock of horses that were once bred at Balnir Farmstead for the House of Menethil, and was named so by Anduin, according to the tradition of paladins and priests by naming his mount with a quality he admires. As a war mount, he has been trained to act counter to his instincts. In battle, he serves as an extension of Anduin and an additional weapon, running down and trampling enemies, unlike regular horses who instinctively shy away from the scent of blood and avoid stepping on other creatures.

Anduin rode Reverence to meet with Sylvanas Windrunner just prior to the Gathering in the Arathi Highlands and later rode the steed into war during the Battle for Lordaeron. Shortly after, when Horde agents infiltrated Stormwind City and freed Princess Talanji and Zul, Anduin was seen patrolling the streets on Reverence.

In Heroes of the Storm
Reverence appears as a in Heroes of the Storm, having been added in the same patch as Anduin. He comes in two alternate colors in the form of "Darkshire Reverence" and "Redridge Reverence", matching the Darkshire Anduin and Redridge Anduin skins, respectively. His backstory reads: "Born to carry princes and kings into battle, Reverence was named not just for his passengers, but for the awe his unstoppable charge inspires."