Cheapest priced copy (Assassin's Creed): $1.49 at Card Kingdom, near mint, their price list as of .
Fatal Push 
Instant · Uncommon · Aether Revolt · #57
Destroy target creature if it has mana value 2 or less.
Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent left the battlefield under your control this turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
15 printings · $1.49 to $139.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 93 | Uncommon | $1.79 | $1.49 |
| Double Masters | 343 | Rare | $14.99 | $8.99 |
| Assassin's Creed | 90 | Uncommon | $1.49 | $1.49 |
| Assassin's Creed | 204 | Uncommon | — | — |
| Aether Revolt | 57 | Uncommon | $1.79 | $5.99Out of stock |
| Friday Night Magic 2017 | 8 | Rare | — | $1.79 |
| Final Fantasy: Through the Ages (Battle at the Big Bridge) | 9 | Uncommon | $1.99 | $4.49 |
| The List | AER-57 | Uncommon | $1.49 | — |
| Secret Lair Drop | 112 | Rare | $20.99 | $13.99 |
| Secret Lair Drop | 884 | Rare | — | $7.49 |
| Secret Lair Drop | 1819 | Rare | $8.49 | $6.99 |
| Secret Lair Drop | 7014 | Rare | $24.99Out of stock | — |
| Secret Lair Drop | 7017 | Rare | $2.99 | — |
| Secret Lair Drop | 7020 | Rare | $2.29 | — |
| Secret Lair Promo | 3 | Rare | — | $139.99 |
4 rulings from Wizards of the Coast
- 7 August 2020Tokens that leave the battlefield will satisfy a revolt ability.
- 7 August 2020If a creature on the battlefield has {X} in its mana cost, X is considered to be 0.
- 7 August 2020Revolt abilities don't care why the permanent left the battlefield, who caused it to move, or where it moved to. They're equally satisfied by an artifact you sacrificed to pay a cost, a creature you controlled that was destroyed by Cast Down, or an enchantment you returned to your hand with Cyclonic Rift.
- 7 August 2020Fatal Push can target any creature, even one with mana value 5 or greater. The creature's mana value is checked only as Fatal Push resolves.