If you want to go down to your local hobby shop and actually compete, you shouldnt have to buy multiple booster boxes, or spend the equivalent money, to have a viable deck
Company: Pokemon USA Brand: Pokemon Series: Sword & Shield Base Set Item Type: Single Card Release Date: February 7, 2020 UPC: Stock #: 321364 Our Guarantees to You, Our Valued Customer
Dragon type Pokemon are difficult to use because their Attacks typically use more than one Energy type and Altaria ex is no different, with its Light Pulse Attack costing one Water and one Metal Energy to use
Note that this is damage, not just combat damage if you can string some rituals and buffs together with cards like Storm-Kiln Artist, Birgi, and Haze of Rage, you can convert that into a Chandras Ignition with little effort
Next to that we can see that its a Grass type, which is a pretty weak type in the current format, as almost nothing will be weak to you