Cheapest priced copy (Murders at Karlov Manor): $0.35 at Card Kingdom, near mint, their price list as of .
Get a Leg Up 
Instant · Uncommon · Murders at Karlov Manor · #161
Until end of turn, target creature gets +1/+1 for each creature you control and gains reach.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Murders at Karlov Manor | 161 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 2 February 2024The number of creatures you control is checked only once, as Get a Leg Up resolves. The bonus won't change if the number of creatures you control changes later in the turn.
- 2 February 2024If you target a creature you control with Get a Leg Up, remember to count that creature.