Cheapest priced copy (Eldritch Moon): $0.35 at Card Kingdom, near mint, their price list as of .
Ruthless Disposal 
Sorcery · Uncommon · Jumpstart 2022 · #462
As an additional cost to cast this spell, discard a card and sacrifice a creature.
Two target creatures each get -13/-13 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Eldritch Moon | 103 | Uncommon | $0.35 | $0.49 |
| Jumpstart 2022 | 462 | Uncommon | $0.35 | — |
6 rulings from Wizards of the Coast
- 13 July 2016If one targeted creature becomes an illegal target, the other will still get -13/-13 until end of turn.
- 13 July 2016You can’t target one creature twice to give it -26/-26.
- 13 July 2016Discarding a card and sacrificing a creature are both part of Ruthless Disposal’s cost. You can’t discard or sacrifice more to target more creatures, and you can’t cast Ruthless Disposal at all if you don’t have any other cards in hand or if you control no creatures.
- 13 July 2016You must target exactly two creatures to cast Ruthless Disposal. However, one of the targets can be the creature you intend to sacrifice to pay Ruthless Disposal’s cost.
- 13 July 2016There’s no way to discard a creature card with madness, cast it, and sacrifice it to pay for both of Ruthless Disposal’s additional costs.
- 13 July 2016Once you begin to cast Ruthless Disposal, no player may take actions until you’re done. Notably, opponents can’t try to remove the creature you wish to sacrifice.