For example, I have a Scion of the Ur-Dragon deck that can kill people in around three turns, its a blast to play, but one I rarely use as its a little higher on the power scale than anything my friends build
As far as bringing cards in, Lithomantic Barrage, Get Lost, and Destroy Evil are all good answers to big creatures that try to roadblock your attacks
Up to four copies of a unique Pokmon card can be in your collection in total (so if you already have three, only one will be transferred), and just one copy of each ACE SPEC, Prism Star, Pokmon Star or part of a V-UNION card
But that strength multiplies if you can play Huatli, use the plus ability to raise the loyalty through the roof, and immediately either use the minus to pump up the crew or ultimate and start drawing a bunch of cards
Here, I look for cards that specifically target enchantments (or artifacts/enchantments), and usually one at a time
Aside from the unique art style, which is perhaps the most immediately obvious clue, these cards have a special rarity symbol