Envisaged Echo/Pillar of Fortitude

Pillar of Fortitude is the Envisaged Echo challenge stage for Kamisato Ayato and rewards

Challenge Objective

In the "Pillar of Fortitude" challenge, there will be a Leader. The Leader also has Attendants that serve as its guards. Each Attendant will increase the Leader's All Elemental RES and Physical RES by 50%. The Attendants will restore the Leader's HP every 5s, with each Attendant able to restore 35% HP. When there are no Attendants on the field, the Leader will lose the above enhancement and restoration effects.
In the "Pillar of Fortitude" challenge, a Pyro amplification device periodically applies Pyro to nearby opponents. Before the Pyro application is removed, the opponents' All Elemental RES and Physical RES are increased.
In the "Pillar of Fortitude" challenge, for every Pyro target destroyed, a number of Elemental Particles will be generated. For every 3 Pyro targets destroyed, characters gain a buff that increases ATK SPD by 35% and reduces the CD of Elemental Skills and Elemental Bursts by 35% for 20s.