Frost Nova

World Event: Midsummer Fire Festival

Daily Instance: Lord Ahune [20+]

Approximate Drop Rate: 1 in 20 dropped (available 15 days per year)

Pet Battle: [25] Tiragarde Sound

Trading Card Game: Worldbreaker

Achievement: WoW's 19th Anniversary

Category: Events

Pet Store 

Achievement: Raiding with Leashes

Category: Collect

World Event: Hallow's End

Vendor: Woim

Zone: Tirisfal Glades

Cost: 150 (unlimited supply)

Vendor: Pippi

Zone: Stormwind City

Cost: 150 (unlimited supply)

Pet Battle: [25] The Waking Shores; [25] The Azure Span

Pet Battle: [25] The Azure Span

World Event: Feast of Winter Veil

Item: [Gaily Wrapped Present] (found under Winter Veil tree)

Contains: 1 in 4 options

Achievement: What Can I Say? They Love Me.

Category: Collect

Pet Battle: [22-23] Zul'Drak

Drop: Cache of Winter

Zone: Ulduar

Approximate Drop Rate: Unknown

Achievement: Abhorrent Adversaries of the Afterlife

Category: Battle