Cheapest priced copy (Mirage): $1.49 at Card Kingdom, near mint, their price list as of .
Discordant Spirit 
Creature — Spirit · 2/2 · Rare · Mirage · #261
At the beginning of each end step, if it's an opponent's turn, put a +1/+1 counter on this creature for each 1 damage dealt to you this turn.
At the beginning of your end step, remove all +1/+1 counters from this creature.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirage | 261 | Rare | $1.49 | — |
2 rulings from Wizards of the Coast
- 4 October 2004This will not count damage that was prevented.
- 1 May 2006In Two-Headed Giant, triggers only once per end of turn, not once for each player.