Check the Mission Log after the event starts. You'll find an entry to clear one of the new event quests on Hard.
Clear the quest on Hard either as the host or solo. Then return to your Mission Log to and get the reward (a free monster.)
Try your hand at Savage if you're feeling confident. Clearing all difficulties — Normal, Hard and Savage — as the host or solo will yield 1 Orb.
For Intermediate Strikers
Clear the Beginner goals above.
Challenge event quests that have both a Savage and Extreme difficulty. These will yield stronger monsters, but are more difficult to complete.
Get the new Extreme quest monsters. Drop rates are higher on Extreme compared to Savage. Plus, if you can beat the quest on Extreme without continuing the monster is guaranteed to drop.
For Advanced Strikers
Clear the Beginner and Intermediate goals above.
Aim for a Max Luck monster.
New Event Series: Nostalgia Blooms
Continue reading for more information on the new event series! The event will start from 11/4 (ET). For event quest times, remember to check the in-game schedule, or the schedule on the home page! Here's a play video of A Flower Blooms on the Battlefield, a new quest in the series!
11/4 - 11/10 (ET)
5☆ Suzuran - Ascendable
5☆ Tanpopo - Ascendable
5☆ Sakura - Ascendable
The following 5☆ monsters will be added starting from the Nostalgia Blooms Hatcher.
For more information on all the 5☆ monsters available in the Hatcher, check here.
All 4☆ monsters in the Hatcher will come with bonus luck.