There are so many +1/+1 counter synergies these days that its incredibly easy to make an oppressively powerful deck with that strategy, and I personally dont like the mental energy required to keep track of all the various triggers those strategies accumulate on the battlefield
Of the three, two of these Pokmon Goldeen and Staryu are un-evolved base Pokmon
Pull rate from Regular Packs: 6.42% The estimated pull rate for Haunter (Mega Shine) from a Regular Pack is approximately 6.42%, meaning you might need to open around 16 Regular Packs to obtain it
Cartas - Cmo poder separarlas (How do you store your cards?) What does each rarity mean
The ability to play cards that dont work in other formats is wonderful, but you need to get the mana to do so first
It doesn't give you a shuffle effect, however, which makes Multiversal Passage a little worse in Legacy decks featuring Brainstorm