You can't attach Fire Energy cards from your hand to Moltres.
Attacks
10Collect Fire
If there are any Fire Energy cards in your discard pile, flip a coin. If heads, attach 1 of them to Moltres.
60Burning Tail
Flip a coin. If tails, discard a Fire Energy card attached to Moltres.
How much is Moltres #H20/144 worth?
Moltres #H20/144 is a Rare Holo card from Skyridge (2003) — today it trades at roughly $349.99 ungraded.
Grading changes the math on this one: a PSA 10 is valued around $11,125.00, roughly 31.8x the raw price, while a PSA 9 sits near $2,880.81. 833 copies have been graded to date, and 14% of them came back a 10 — worth knowing before you pay grading fees.
These figures come from nightly market-data syncs verified against completed sales. Use the chart above to see the trend before you buy or sell.