Once during your turn, when you put Rayquaza ex from your hand onto your Bench, you may move any number of basic Energy cards attached to your Pokémon to Rayquaza ex.
Attacks
20×Spiral Blast
Does 20 damage for each basic Energy card attached to Rayquaza ex.
How much is Rayquaza ex #102/107 worth?
Rayquaza ex #102/107 is a Rare Holo EX card from Deoxys (2005) — today it trades at roughly $999.00 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $26,000.00, roughly 26.0x the raw price, while a PSA 9 sits near $5,823.00. 1,228 copies have been graded to date, and 3% of them came back a 10 — worth knowing before you pay grading fees.
Prices on this page refresh nightly from live TCGplayer market data and are cross-checked against actual sold prices, so a single inflated listing never becomes "the price". The chart above has the full history.