They are really hard to pull, but even then, some of them might not be rare in terms of price, as these are determined by various factors such as the art, the usefulness, or the Pokemons popularity
The workaround is that it untaps whenever you cast a historic spell
Merry, Esquire of Rohan: Merry is a perfect friend for Amy, as Merry draws cards, and joins in the hasty attacks, all the way from Middle-Earth
In addition, the character art was given a reflective foil treatment, making the Pokmon literally "shine" (the only exception to this is Shining Mew, which was released as a promotional card in Japan only and is holo with an additional glitter coating)
You then deal 40 damage multiplied by how many heads you got, for up to 80 damage at the cost of one grass and two colorless energy
Place the rest of the cards in a stack face down