Fire Emblem Heroes - content update for Dec. 10th, 2019

[Aether Raids] Season 57 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): Altina (Dawn’s Trueblade), Echidna (Unyielding Idealist), Perceval (Knightly Ideal), Larum (Sprightly Dancer), Igrene (Nabata Protector), Chad (Lycian Wildcat), Brunnya (Devoted General), Panne (Proud Taguel), Eirika (Graceful Resolve), and Fjorm (Princess of Ice)
Bonus Structures (Level +1): Cavalry School (O, D)

[Summoning Focus] A new Summoning Focus is now live: Double Special Heroes. It features the following Heroes: Lilina (Beachside Bloom), Flora (Signature Dish), Tanith (Forthright Heart), Pent (Fancy Fiancé), Elincia (Estival Princess), Sanaki (Apostle in White), Xander (Dancing Knight), and Ursula (Clear-Blue Crow) (available until December 25th)

[Events] Pre-registration for the 19th Grand Conquests event is now live (available until December 12th)

[Allegiance Battles] Season 34 of Allegiance Battles is now live. The Target for this Season is: Hrid (Icy Blade) (available until December 17th)