Like most Magic: The Gathering cards, the value of Arwen, Weaver of Hope 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 (Tales of Middle-earth Commander)
With Iconics 20% buyers fee on top, that brings the total amount paid for the card to $220,574 (168,992) - the most ever paid for this particular Pokmon card, according to card game news outlet Cardhops
You choose the creature to teach as Pyromancy 101 resolves
Karmic Guide is similar in its use: it can be a decent card to take advantage of some mild graveyard effects, or it can be made part of a combo
Its just another walker to throw in the pile
Discover this version of The Soul Stone exclusively in Collector Boosters