Winter's Bane Event (29 June till 19 July)
The Banemaw event will start on Monday 29th June, and will run for 3 weeks
Week 1: Mon 29 June - Sun 5 July
Week 2: Mon 6 July - Sun 12 July
Week 3: Mon 13 July - Sun 19 July
Your village must have a Stronghold level 4 or higher to see Frost Fang currency or participate in the event
The event introduces a unique currency called Frost Fangs. There will be a Frost Fang tally visible at the top of your village and map screen. Tapping on it will reveal more information.
You can acquire Frost Fangs by winning PvP battles (multiplayer and The Arena), and also by completing the new Banemaw's Hunt Campaign available from the map. After your victory, you'll first see the regular screen showing how much honor, gold and rings you won, followed by a 2nd screen showing your Frost Fangs. You can toggle between the 2 pages with the left and right arrows on the side of the screen.
Once you acquire 25 Frost Fangs, you can head on over to "Build > Chests" from your village screen, and purchase a unique chest. These chests will be different on week1, 2 and 3. NOTE: You must spend your Frost Fangs by July 26th.
Week 1 chest is Birna's Boon:
Rare Ancient: Admiral Lee
Epic Ancient: Birna
1,000 Ice Primus
50 Rings
Battle Boost: Ice Elemental
Exclusive Battle Boost: Cold Blood [Epic]
Exclusive Battle Boost: Shatter [Legendary]
These 2 exclusive Battle Boosts can only be acquired from Birna's Boon chest on week 1 of the event, get them while you can!
Cold Blood: Epic Boost - friendly units freeze nearby spell towers. This effect is automatic and will trigger whenever one of your troops comes within range of a spell tower.
Shatter: First time Legendary Boost drop - units deal 75% bonus damage to frozen targets. This effect is automatic, the bonus damage
will happen on any frozen target caused by your Ancient's spells.
You can select these boosts from the battle screen prior to beginning your attack (the diamond between "change troops" and "change ancient" buttons).
Week 2 chest is Banemaw's Bounty
Week 3 chest is Winter's Bite
Videos on event:
Taken from here