Phantom Flow: Mister Connected - Inazuma team first clear
It.. isn't as hard as I think, since I have Sayu to heal. This is probably the only time in this event Venti is quite viable, since there are treasure horders, and there is no specific enemies to be killed. and the 3 gems effect is perfect for Kazuha and Sayu burst.
Shinryuu Mechanics
Nimbus Gems that release electric pulses to link up with characters who are carrying Electrograna or affected by Electro will appear during this challenge.
When linked to a Nimbus Gem, characters will lose 5% HP every 3s, and will restore 5% when they defeat opponents.
Additionally, characters will gain the following effects depending on the number of Nimbus Gems linked to them:
1 Gem: All characters in the party gain 50% Energy Recharge.
2 Gems: All characters in the party also gain 1000 ATK.
3 Gems: Characters' Normal, Charged, Plunging Attacks, Elemental Skills and Elemental Bursts that hit opponents will also unleash shockwaves at that opponent's position, dealing DMG to the surrounding opponents. 1 shockwave may be created in this way every 2s.