Cheapest priced copy (Core Set 2021): $0.69 at Card Kingdom, near mint, their price list as of .
Pack Leader 
Creature — Dog · 2/2 · Rare · Core Set 2021 · #345
Other Dogs you control get +1/+1.
Whenever this creature attacks, prevent all combat damage that would be dealt this turn to Dogs you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
7 printings · $0.69 to $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2021 | 29 | Rare | $0.69 | $0.79 |
| Core Set 2021 | 345 | Rare | $1.99 | $1.99 |
| Core Set 2021 | 392 | Rare | — | $1.29 |
| The List | M21-29 | Rare | $0.69 | — |
| Core Set 2021 Promos | 29p | Rare | $0.99 | $1.49 |
| Core Set 2021 Promos | 29s | Rare | — | $2.79 |
| Secret Lair Drop (仲間を導くもの、ガルク) | 7056 | Rare | — | — |
2 rulings from Wizards of the Coast
- 23 June 2020Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a Dog you control may become lethal if Pack Leader leaves the battlefield during that turn.
- 23 June 2020Once Pack Leader attacks, its effect prevents damage that would be dealt to Dogs you control even if Pack Leader leaves the battlefield.