Since discussion in the Disspell (Dispel) rule topic has turned in another direction, a more apt separate topic was in order. Below is a reiteration of two possible cards so far.
Overall, they are treated like Spell cards for most rules but are not discarded when used. They still count against Spell limit, and for keeping them to reuse they have a cost, usually discarding another Spell. And they count against Spell limit. Before anyone asks... Yes, since these are Spell cards themselves - cards out of the Spell deck - you can discard one itself (if one requires a Spell card discard) for using it. Thereby it also operates just like a normal Spell (a trick that Mr. Brogger suggested).
All cards are layout reduced for easier reading; right-click and View or Save to get the print resolution version. Suggestion for revisions and other cards based on known Special Abilities that are based in magic are welcome.