Cheapest priced copy (Duel Decks: Knights vs. Dragons): $0.35 at Card Kingdom, near mint, their price list as of .
Zhalfirin Commander 
Creature — Human Knight · 2/2 · Uncommon · Duel Decks: Knights vs. Dragons · #13
Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)
{1}{W}{W}: Target Knight creature gets +1/+1 until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Knights vs. Dragons | 13 | Uncommon | $0.35 | — |
| Mirage | 49 | Uncommon | $0.35 | — |
| Time Spiral Timeshifted | 18 | Special | $0.35 | $0.79 |