Cheapest priced copy (Ikoria: Lair of Behemoths): $0.35 at Card Kingdom, near mint, their price list as of .
Blisterspit Gremlin 
Creature — Gremlin · 1/1 · Common · Ikoria: Lair of Behemoths · #108
{1}, {T}: This creature deals 1 damage to each opponent.
Whenever you cast a noncreature spell, untap this creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 108 | Common | $0.35 | $0.79 |
| Jumpstart 2022 | 500 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 17 April 2020An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
- 17 April 2020In a Two-Headed Giant game, Blisterspit Gremlin's first ability causes the opposing team to lose 2 life.
- 17 April 2020Players can cast spells and activate abilities after the triggered ability resolves but before the spell that caused it to trigger does.