Daily Quest: Monster Hunting Saber (Monday) Advanced is the best AP-saving location farm Phoenix Feather. You'll get about 1-2x Phoenix Feather by spending 300AP.
Daily Quest: Monster Hunting Archer (Tuesday) Expert is the best time-saving location farm Phoenix Feather. You'll get about 1-2x Phoenix Feather by spending 400AP.
Here is a list of servants that need Phoenix Feather to perform Ascension and Skill up.
The first Halloween event on the EN server has been announced finally!
Note: No Bond CE's here.
Halloween 2017 Event: The Adventure of Singing Pumpkin Castle [US/NA]
5 Star Servants Tier List
Kato Danzo (Katou Danzou)
FGO Reroll Tier List
Tamamo no Mae
Halloween Petit Devil
Archer Inferno (Tomoe Gozen)
Elizabeth Bathory (Caster, Halloween)
Trick or Treat
Maid in Halloween