For 3 Energy (2x Grass, 1x Colorless), it does 80 DMG, and that goes to 150 DMG if you get heads from a coin flip (Will Supporter card, anyone?)
The rarity of this holographic version, combined with its 1st Edition status, makes it a centerpiece of immense historical and cultural value for the Pokmon TCG
Buzzwole-GX has Jet Punch (requiring one Fighting Energy card) that will let you deal 30 damage to one of your opponents Benched Pokmon, Knuckle Impact (requiring three Fighting Energy cards) that deals 160 damage but will mean that it cannot attack next turn, and a potentially potent Absorption GX move (requiring three Fighting Energy cards), that deals 40 damage for each of your remaining Prize cards
Nykthos is a little hard to work with and isn't an amazing drafting cube card as such
It's a true "grail" card, and its market value will reflect this
Most Expensive Pokemon Lost Origin card list & price guide