old gastly pokemon card evolves-from:gastly ‹ PkmnCards [Colorless]. Gastly | Unbroken Bonds |

Appendix and Reference Type 4/Limited Infinity Introduction Type 4: A Way to Enjoy Magic Again Part 1 Type 4: A Way to Enjoy Magic Again Part 2 Type 4: A Way to Enjoy Magic Again Part 3 The Fourth Type * Chaos Stack a Chaos Stack is a separate stack of cards in addition to the normal Type 4 stack, and is used in conjunction with the Chaos Rule, which is essentially if X or more spells have been cast in a single turn (where X is an amount agreed to by the players beforehand), all spells on the stack are paused and the top card from the Chaos Stack is immediately flipped up and resolved, and then the stack and rest of the game is unpaused and continues as normal

I believe those have the most potential for growth other than gold stars in the next few years

How can I tell how rare a card is

In fact, I doubt youd be able to sell any of them online