Cheapest priced copy (Bloomburrow): $0.49 at Card Kingdom, near mint, their price list as of .
Whiskervale Forerunner 
Creature — Mouse Bard · 3/4 · Rare · Bloomburrow · #40
Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, look at the top five cards of your library. You may reveal a creature card with mana value 3 or less from among them. You may put it onto the battlefield if it's your turn. If you don't put it onto the battlefield, put it into your hand. Put the rest on the bottom of your library in a random order.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Bloomburrow | 40 | Rare | $0.49 | $0.49 |
| Bloomburrow | 301 | Rare | $0.59 | $1.49 |
| Bloomburrow Promos | 40p | Rare | $1.29 | $0.49 |
| Bloomburrow Promos | 40s | Rare | — | $1.29 |
3 rulings from Wizards of the Coast
- 26 July 2024If a spell or ability you control has one or more of its targets changed to a creature you control with a valiant ability, that ability will trigger if that creature hasn't yet been the target of a spell or ability you control this turn.
- 26 July 2024If you create a copy of a spell on the stack and target a creature you control with a valiant ability, that ability will trigger as long as the creature hasn't yet been the target of a spell or ability you control this turn.
- 26 July 2024Valiant abilities will resolve before the spell or ability that caused them to trigger.