It isnt that they arent fun, but they can be a rabbit hole that its difficult to climb out of
Like the synergy between Suplex and Phantom Train before it, Sephiroth, Fabled Soldier and Aerith have a synergy that grimly reflects his fated killing: Aeriths rules let her gain +1/+1 counters every time you gain life, and Sephiroth, Fabled Soldier gives you life every time another creature dies
The value of Den of the Bugbear fell slightly heading into fall rotation with a classic Showcase foil module valued at around $13
You can play the permanent part
And while she has some positive aspects (the phenomenal ward ability and two lore value), ultimately she probably wont see a ton of play given there are better options out there for granting extra strength
Legendary Creature - Elf Noble Galadriel, Gift-Giver Whenever Galadriel enters or attacks, choose one Put a +1/+1 counter on another target creature