Cheapest priced copy (Foundations Commander): $1.99 at Card Kingdom, near mint, their price list as of .
Overwhelming Stampede 
Sorcery · Rare · Modern Masters 2015 · #153
Until end of turn, creatures you control gain trample and get +X/+X, where X is the greatest power among creatures you control.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
11 printings · $1.99 to $6.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2014 | 208 | Rare | $2.99 | — |
| Commander 2015 | 196 | Rare | $2.99 | — |
| Commander 2019 | 175 | Rare | $2.99 | — |
| Commander Anthology | 131 | Rare | $3.49 | — |
| Duskmourn: House of Horror Commander | 192 | Rare | $2.49 | — |
| Foundations Commander | 218 | Rare | $1.99 | — |
| Tales of Middle-earth Commander | 254 | Rare | $2.49 | — |
| Magic 2011 | 189 | Rare | $3.99 | $6.99 |
| Modern Masters 2015 | 153 | Rare | $4.49 | $6.99 |
| Marvel Super Heroes Commander | 178 | Rare | $1.99 | $3.49 |
| Marvel Super Heroes Commander | 385 | Rare | $4.49 | — |
One ruling from Wizards of the Coast
- 15 August 2010You check the power of your creatures as Overwhelming Stampede resolves. For example, if you control a 2/1 creature, a 2/2 creature, a 2/4 creature, a 4/1 creature, a 5/5 creature, and a 5/6 creature at that time, each of your creatures gets +5/+5 and gains trample until end of turn.