Thats the best thing going for it, unfortunately
Treacherous Terrain: It's a late game cast, and it is a clean way to take out one or more opponents
If your opponent's Pokemon is down to its final 20 HP when you play Guzma, the supporter will remove the cape, KOing the Pokemon
Players, rather than collectors, may be better suited by this cards less expensive, more common variantssuch as card 151 of the 165 card set, which sells at a much more reasonable average of around $9
Sephiroth, Fabled SOLDIER gives you that classic and powerful payoff in the command zone along with a sacrifice outlet and card draw
Venomcrawler gets a +1/+1 counter whenever a creature dies, making it a good candidate for sacrifice focused decks