Rose

"In his strong hand the man held a Rose. And his aura burned bright."

- Unknown Individual

Rose is a Specialized Weapon Variant of the Raging Bull revolver, but Rose is classified as a Hand Cannon. Rose, technically, made its first appearance in Call of Duty: Undead Warfare II but reappears in Black Ice Zombies with a more darker appearance and looking worn out.

Rose is required for the minor easter egg Awoken Hand Cannon and will transform into Lumina once completed. Just like Lumina, if players wish to instead keep Rose and not transform it into Lumina, they'll be able to Pack-A-Punch it.

Weapon Perks
Weapon damage is increased from melee kills, which is a 12% increase. Stacking up to 5x and lasts for a short duration for 6 seconds. This duration will reset upon gaining an additional stack of Rose Thorns. With all five stacks of Rose Thorns, Rose will deal 60% more damage.
 * Rose Thorns

Kills made with Rose increases the duration of Lumina's Blessing of the Sky buff once obtained. This stacks to a maximum of 12 seconds. Every kill adds 0.15 seconds to Blessing of the Sky. However, this is only applied to the player working towards getting Lumina and is not shared with the other three players.
 * Love Thou Rose