As part of the Tokyo Mirage Sessions #FE Encore release celebrations, Fire Emblem Heroes will be running a new Tempest Trials+ event, “Mirage Vortex”, between 21st and 31st January 2020 (UTC).
The key rewards are 4 and 5-star copies of Itsuki: Finding a Path, plus the following Sacred Seals: Defiant Def 1, Mirror Stance 1 and Chill Res 1. Until the Tempest Trials+ is over, there will be a 10 day Log-in Bonus as well.
If you want to plan ahead, the Bonus Heroes that will boost your Tempest Trials+ score are: Tsubasa, Mamori, Kiria, Eleanora, Itsuki, Chrom, Caeda and Virion. The first four can be summoned from the upcoming TMS#FE banner.
Otherwise, you could attempt to summon Chrom, Caeda and Virion from the dedicated Tempest Trials banner. That said, we’d be very surprised if you didn’t have a Virion lying around somewhere (unless you sent home all your copies).
Also, just in case you missed it, a new Tap Battle event started yesterday. This one features a new backdrop based on TMS#FE, plus a variety of vocal songs from the game. In addition, you can earn Tsubasa and Kiria themed accessories via the Tap Battle quests.