First, its true mana cost is very high for what it does, meaning that we're basically forced to EphemerateEphemerate it if we want to get something good out of it
Theyve even got a whole wall of PSA slabs which I thought was super cool
Gengar was among the first Pokmon ever designed by Sugimori, and its genesis even predates the name Pokmon Sugimori created Gengar back when the game was still slated to be called Capsule Monsters. A notable card with a notably high price tag to match it
The True Scriptures offers removal, resource denial and enables what amounts to Rise of the Dark Realms
Or stronger creatures like Halvar, God of Battle or the Sun Titan, which allow you to put a permanent card with a mana cost of three or less from the graveyard back into play, can be of great use
Crypolith Rites / Song of Freyalise / Earthcraft 6+ These three are a very different kind of payoff to the rest of the option here