Gravestorm appears only on three cards: Bitter Ordeal, Ominous Harvest, and Follow the Bodies
This card is another that's a part of the Team Magma vs Team Aqua pack release but unlike the other expensive cards in that set it seems its price has been dropping throughout the years
Others like Jegantha, the Wellspring stand out because they are too widely played and benefit lots of decks, and undercut the diversity of decklists
The Tiamat monster class also has abilities that work this way, which are much better because it's much easier to limit the area of effect of those spells
2 Fiendsmith Engraver Defines the Current Meta An Amazing Engine With Nearly Endless Combo Routes The current meta allows players to experiment with numerous different engines so that players can get the most out of their engine while also playing numerous non-engine cards to stop the opponent
To spot a potentially valuable card, look for a star symbol in the bottom corner, which indicates it's a rare card (a circle is common, and a diamond is uncommon)