Cheapest priced copy (Guilds of Ravnica): $0.35 at Card Kingdom, near mint, their price list as of .
Spinal Centipede 
Creature — Insect · 3/2 · Common · Guilds of Ravnica · #86
When this creature dies, put a +1/+1 counter on target creature you control.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 86 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 5 October 2018If another creature you control is dealt lethal damage at the same time as Spinal Centipede, they’re destroyed at the same time. That creature can’t receive a counter from Spinal Centipede’s ability in time to save it.