I don't own Fell Hammer.
I have never seen a Fell Hammer in Arena.
I have never seen a Champion Spotlight of Fell Hammer.
I looked up Fell Hammer to see how strong he hits.
Fell Hammer A1 is considered Godlike Damage.
Fell Hammer A2 is considered Strong Damage.
Lets pretend I owned Fell Hammer + decided to use Fell Hammer in Arena.
I guess I would try to run Fell Hammer on a Defensive Team for Arena.
I would put Fell Hammer in Stalwart Gear + Immortal Gear.
I would try C.RATE Gloves + ATK% Chest + HP% Shoes
I would aim for RESIST > ATK% > C.DMG > SPD for Substats.
I would try FLAT DEF RING with ATK% + HP% or DEF% in Substats
I would try C.DMG AMULET with RESIST + ACC + Flat ATK or DEF in Substats
I would try RESIST BANNER with SPD + ATK% + HP% or DEF% in Substats
I have 0 Idea how good the build would be on him, but it would be interesting.
The build could be totally trash or completely brillant.
I don't really know.