Besides the damage you may also search your deck for two basic energy cards and attach them to 1 of your Pokemon, so with this move you could end up with only 1 energy card on Ampharos by the time you evolve it and then you could use Acceleration Bolt and attach two more energy cards to Ampharos and use its second move, Thunder, in only two turns, this move requires 3 energy cards, two colorless and one electric, which does 80 damage but you also have to flip a coin with this move and if you get tails Ampharos does 20 damage to itself
One Rare or Mythic Rare (but not both)
Plus, in the right deck, you can still often cast Thought Monitor for just one mana, although thats more difficult to pull off
And you can easily find the right price by browsing sold listings of that card, and because Pokmon cards sell a lot on eBay, that shouldnt be a problem for you
If Brambleguard Captain's power is negative as its ability resolves, the target creature will get +0/+0 until end of turn
You sacrifice the cat to the artifact and get a food token