Powerful Cavalier Crest

Legendary Mount Strap Tier IV
This item might not be obtainable Required Expansion Rise of the Angry Earth

This gives a large boost to mount summoning speed.

Bind On Pickup Requires Riding Skill Lv. 60 Tier IV 0.1 Weight 1000 Durability
No Source

We can't find any source for this item (quests reward, drop, etc). It's highly probable this item is not obtainable right now.