is gengar a rare pokemon card Amazon.com: Pokemon - Gengar ex - Ultra Rare - Full Art Psychic Rarity Gengar ex 104/162 - Pokemon

Duskmantle Guildmage has two abilities: the first one makes your opponent lose one life each time a card is put in their graveyard, and the second puts the top two cards of their library into their graveyard

Dionus, Elvish Archdruid is a special lord that grants a sweet ability for the mana sources among the elves, not only do they get to produce mana again, they continually grow

Sword of Forge and Frontier Sword of Forge and Frontier can access two extra cards from the top of your library each time you hit an opponent

This is especially important if the card is connected to any kind of interesting origin story (like most of the cards above)