Cheapest priced copy (Game Night: Free-for-All): $0.49 at Card Kingdom, near mint, their price list as of .
Thorn Lieutenant 
Creature — Elf Warrior · 2/3 · Rare · Game Night: Free-for-All · #109
Whenever this creature becomes the target of a spell or ability an opponent controls, create a 1/1 green Elf Warrior creature token.
{5}{G}: This creature gets +4/+4 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Game Night: Free-for-All | 109 | Rare | $0.49 | — |
| Core Set 2019 | 203 | Rare | $0.49 | $0.49 |
| Core Set 2019 Promos | 203p | Rare | $0.49 | $2.99 |
| Core Set 2019 Promos | 203s | Rare | — | $0.49 |
One ruling from Wizards of the Coast
- 13 July 2018Thorn Lieutenant's triggered ability resolves before the spell or ability that caused it to trigger. It resolves even if that spell or ability is countered.