pokemon card meltan [2] Headbutt (20) Weakness / Resistance / Retreat Cost Melmetal (Genetic Apex #182/226, 3-Diamonds)

Even now that the competitive format has moved on, the card holds value

While sacrifice sources are extremely important in these sorts of decks, this cards biggest strength is its ability to exile cards from graveyards (Im looking at you, Uro)

What are the weaknesses and retreat cost of this Gengar ex card

Because it had a keyword that also existed as a keyword counter (we called them "inheritable keywords"), the mutated creature would get a keyword counter with that ability

Exchange that card with the top card of your library., so you basically just end up losing the game and probably a Swamp, but if you are able to cast a Darkpact you get to essentially trade your opponent a Swamp for whatever they anted - pretty dirty and cheesy, especially if they flip over a spicy rare