Cheapest priced copy (Dragon's Maze): $0.35 at Card Kingdom, near mint, their price list as of .
Warleader's Helix 
Instant · Uncommon · Dragon's Maze · #116
Warleader's Helix deals 4 damage to any target and you gain 4 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragon's Maze | 116 | Uncommon | $0.35 | $0.49 |
| Friday Night Magic 2014 | 1 | Rare | — | $0.49 |
| Ultimate Masters | 210 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 7 December 2018If the chosen target becomes an illegal target for Warleader’s Helix, the spell doesn’t resolve. You don’t gain life.