Excerpt from the event post:

From maintenance on Tuesday, February 4 until maintenance on Tuesday, February 11, each of the following strongboxes has a chance at some incredible jackpot rewards:

• Locked Item XP Strongbox
• Locked Gem Strongbox
• Locked Talent Strongbox
• Locked Crafter’s Strongbox
• Locked Noctenium Strongbox
• Locked Fashion Strongbox

Jackpot rewards this week include:

• Flying Skill: Urvog, a blue phoenix flying mount with bonus auras
• Improved Dark Shard Weapon Feedstock ×20 (avg NA broker 90k g each before the event)
• Improved Dark Shard Armor Feedstock ×20 (avg NA broker 50k g each before the event)
• Refined Duranium Ore ×250 (nontradeable)
• Golden Talents ×6,000 (avg NA broker 15 g before the event)
• Silver Talents ×6,000 (avg NA broker 60 g before the event)
• Diamonds ×15 (avg NA broker 10500 g before the event)

Note: Prior strongbox events had an event jackpot (the added jackpot possibilities that are random and can happen on any type of strongbox) of 1.4% and a regular jackpot (the normal “big prizes” that are specific to the box type you are opening) rate of 3.6%. Don’t expect an event jackpot with less than 50 strongbox keys.