Firion, Wild Rose Warrior doesn't feel as impactful as other equipment supports Final Fantasy has brought, but the idea of having it in play and casting any Sword and being able to copy and equip it to a creature makes it an effective enabler for lists that might not be geared towards Colossus Hammer
Obviously, using Noctiss final ability, you can set things up so that Noctis enters during combat and lets you attach an equipment for free
Its GX attack, which can only be used once per game, can deal 200 damage, but at a cost of one extra Energy (on top of its two Fighting, one Colorless cost) it can prevent being Knocked Out on its next turn and remain in play with 10 HP
Why Its Rare : Its limited release and the iconic status of Pikachu make it one of the most sought-after cards
It's designed for casual Commander/EDH play and offers a fun, themed experience right out of the box