Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Dauthi Horror 
Creature — Dauthi Horror · 2/1 · Common · The List · #TMP-122
Shadow (This creature can block or be blocked by only creatures with shadow.)
This creature can't be blocked by white creatures.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 748 | Common | $0.35 | — |
| The List | TMP-122 | Common | $0.49 | — |
| Tempest | 122 | Common | $0.39 | — |
3 rulings from Wizards of the Coast
- 19 March 2021Once a creature has been blocked, that creature remains blocked and will deal and be dealt combat damage even if it gains or loses shadow or if the blocking creature gains or loses shadow.
- 19 March 2021If an attacking creature has multiple evasion abilities, such as shadow and flying, a creature can block it only if that creature satisfies all of the appropriate evasion abilities.
- 19 March 2021Multiple instances of shadow on the same creature are redundant.