Boast abilities can only be activated if the creature attacked that turn
(The reason you would want to play this over the other type of card draw is in very specific types of decks that need immediate and temporary card draw
Honestly, this maybe should be a demon typal deck, assuming you can slot in enough sacrifice fodder to cheat in your demons
For each counter, you can trade them in for a 2/2 flying Drake at instant speed to protect them from removal
Lucario is a popular Fighting-type Pokmon, and often used in powerful Fighting-type decks, so players and collectors were excited about a Mega Evolution of this iconic Pokmon
Ive always loved utility-focused typal decks like Birds, Clerics and Wizards, and now it feels like every type gets more cards in the vein of Keeper of the Nine Gales or Celestial Gatekeeper than it does Aven Brigadier