Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Invigorated Rampage 
Instant · Uncommon · Aether Revolt · #86
Choose one —
• Target creature gets +4/+0 and gains trample until end of turn.
• Two target creatures each get +2/+0 and gain trample until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Aether Revolt | 86 | Uncommon | $0.49 | $0.79 |
| Foundations Jumpstart | 567 | Uncommon | $0.35 | — |
| The List | AER-86 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 9 February 2017If you choose Invigorated Rampage's second mode and one target becomes an illegal target, the remaining target gets +2/+0 and gains trample. It doesn't get +4/+0.