Cheapest priced copy (Mirrodin): $0.99 at Card Kingdom, near mint, their price list as of .
Lightning Coils 
Artifact · Rare · Mirrodin · #198
Whenever a nontoken creature you control dies, put a charge counter on this artifact.
At the beginning of your upkeep, if this artifact has five or more charge counters on it, remove all of them from it and create that many 3/1 red Elemental creature tokens with haste. Exile them at the beginning of the next end step.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.99 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 198 | Rare | $0.99 | $1.99 |
| Salvat 2005 | I37 | Rare | — | — |