Like most Magic: The Gathering cards, the value of Long List of the Ents depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (The Lord of the Rings: Tales of Middle-earth)
She really cares about Black dorks and thus will have some fun things happening
Casting Cost: Card Type: Enchantment Card Text: Each noncreature, non-Equipment artifact is an Equipment with equip and "Equipped creature gets +X/+0," where X is that artifact's converted mana cost
Value Cards: Arahbo, Roar of the World Hungry Lynx Leonin Shikari Mirri, Weatherlight Duelist Alms Collector Balan, Wandering Knight Qasali Slingers Kindred Summons Skullclamp Lightning Greaves Sword of the Animist Heralds Horn Hammer of Nazahn Miraris Wake Zendikar Resurgent On release, Feline Ferocity weighed in at around $135 and has since appreciated to $186, and $140 of that more or less comes from these 15 cards
You get to effectively stop two combats worth of damage with a single card
Traveling Chocobo (Borderless Art, Blue Neon Ink) Mythic Rare, 511c Chocobos are a species of bird that are synonymous with Final Fantasy