Cheapest priced copy (Invasion): $0.59 at Card Kingdom, near mint, their price list as of .
Tsabo's Assassin 
Creature — Phyrexian Zombie Assassin · 1/1 · Rare · Invasion · #128
{T}: Destroy target creature if it shares a color with the most common color among all permanents or a color tied for most common. A creature destroyed this way can't be regenerated.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.59 to $9.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Invasion | 128 | Rare | $0.59 | $9.99 |
| World Championship Decks 2001 | ar128sb | Rare | $0.59 | — |