amazon mtg cards The One Ring · The Lord of the Rings: Tales of Middle-earth (LTR) #0 · Scryfall Magic: The Gathering Search The One Ring MTG -

One with Nature is a Sword of the Animist if you connect with a player for a measly one mana

If the copied creature is copying something else, then Mockingbird enters as whatever that creature copied, with the noted exceptions

Her abilities seem to mostly involve her red and black nature by allowing you to sacrifice cards to give her flying allowing her to directly attack your opponent or remove cards

Since you can't actually buy back Sephiroth with Raise the Past, or get a trigger off Enduring Innocence or Snarling Gorehound, this makes me believe you only want one or two copies of this card as a value engine to close out games