Cheapest priced copy (Commander 2016): $0.35 at Card Kingdom, near mint, their price list as of .
Horizon Chimera 
Creature — Chimera · 3/2 · Uncommon · Theros · #194
Flash
Flying, trample
Whenever you draw a card, you gain 1 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 204 | Uncommon | $0.35 | — |
| Theros | 194 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 15 September 2013If you draw multiple cards, Horizon Chimera's ability will trigger that many times. Each of these abilities will cause a separate life-gaining event.