Shout of Power is good in that not only does it do 20 base damage for a single Fighting Energy, but it also lets you attach a basic Energy card from your discard pile to 1 of your Benched Pokemon, helping you to build up your Benched forces. Also with a card like Machamp #46 available to pump all of your Fighting-type Pokemon’s attacks by 20, you’re doing 40 damage for one Energy and potentially getting an Energy onto one of your Lucario EX, Machamps, or other Fighting-type Pokemon.
The second attack, Sky Lariat, is fairly basic. For 2 Fighting Energy and one colorless Energy, it deals 90 base damage and nothing else. Again, this could be 110 damage with a Machamp on board, which is decent for 3 energy, especially when one is colorless.
As holo rare cards in this set go, Landorus is definitely one of the better ones and always a good pull to have, not only being a Legendary Pokemon for collectors, but also one that players will find a use for, as well.