Cheapest priced copy (Chronicles): $0.35 at Card Kingdom, near mint, their price list as of .
Banshee 
Creature — Spirit · 0/1 · Uncommon · The Dark · #40
{X}, {T}: This creature deals half X damage, rounded down, to any target, and half X damage, rounded up, to you.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.35 to $0.59 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Chronicles Foreign Black Border | 29 | Uncommon | — | — |
| Chronicles | 29 | Uncommon | $0.35 | — |
| The Dark | 40 | Uncommon | $0.59 | — |
One ruling from Wizards of the Coast
- 1 October 2009If the targeted permanent or player is an illegal target by the time Banshee's ability resolves, the ability doesn't resolve. You won't be dealt damage.