Fire Emblem Heroes - content update for Dec. 11th, 2018

[Summoning Focus] A new Summoning Focus is now available: Hero Fest. It includes the following Heroes: Eir (Merciful Death), Owain (Chosen One), Ophelia (Dramatic Heroine), and Lewyn (Guiding Breeze). (available until December 18th)

[Story Maps] The first two chapters of Book III of the main story are now available. Clear Chapter 1, Part 5 on Normal to get [5 ★] Eir: Merciful Death (no end date)

[Story Maps] A new Squad Assault is now available: 17th Assault (Lunatic) (no end date)

[Quests] Not one, but two new sets of Quests are now available: The Dread Gate and Death (available until December 28th)

[Aether Raids] Season 5 of Aether Raids is now live (available until December 17th)

Bonus Heroes (HP+10, Atk/Spd/Def/Res+4 + Lift+20 and Double EXP and SP if you win a battle): Hrid (Icy Blade), Surtr (Ruler of Flame), Laegjarn (Sheathed Steel), Laevatein (Searing Steel), Helbindi (Savage Scourge), Ylgr (Fresh Snowfall), Navarre (Scarlet Sword), Zephiel (The Liberator), Ephraim (Legendary Lord, Anna (Commander)
Bonus Structures (Level +1): Catapult (O, D)

[Aether Raids] New structures are now available:

New: Escape Ladder (O)
MAX LV. Up (now to LV. 4): Infantry School (O, D), Armor School (O, D), Cavalry School (O, D), Flier School (O, D).

[Aether Raids] The Elements for the current season are: Light and Dark (available until December 17th)

[Elements] The Elements for the current season are: Wind and Fire (available until December 18th)

[Heroic Grails] Two new Heroes can now be summoned using Heroic Grails: Dorcas (Pumpkin Smasher), and Aversa (Dark One). Characters page updated! (no end date)

[Log-in Bonus] To celebrate the arrival of the first Mythic Hero, all players can get the following as special Log-in Bonus: Aether Stones x300 (no end date?)

[Log-in Bonus] A new set of Daily Log-in Bonuses is now live: Hero Fest. It allows you to get a First Summon Ticket every day (7 tickets in total) (available until December 18th)

[Log-in Bonus] A new set of Daily Log-in Bonuses is now live: Book III Begins. It allows you to get 2 Orbs every day (20 Orbs in total) (available until January 1st)

[Store] The latest Special Orb Promo is now live: December. It includes 21 Orbs (15 + 6 Bonus) and Refining Stone x60 (available until December 25th)

[Wallpaper] To celebrate the launch of Book III of the main story, smartphone wallpapers featuring the new characters are now available!