Condition is still a huge factor for Arcanine and the other Base Set cards still to come, but perhaps even more important is this card's edition
We have three viable Mono Red decks, starting with a classic Burn deck, a Wizard deck and Devotion deck
Sacrifice after VI.) I, II, III, IV, V, VI Note a creature type that hasn't been noted for Long List of the Ents
Also introduced Secret cards and holographic Trainer and Energy cards
Most of these are identified by one of the features above, but a few cards are unusual, and sometimes valuable, for other reasons: Full art cards have a picture that extends beyond the entirety of the card, w/ text printed and overlayed atop it
Also useful for forcing an attack if you can make a deal for someone else to trade if they are attacked by the goaded creature