Cheapest priced copy (The Lost Caverns of Ixalan Commander): $0.59 at Card Kingdom, near mint, their price list as of .
Merfolk Sovereign 
Creature — Merfolk Noble · 2/2 · Rare · Magic 2010 · #62
Other Merfolk creatures you control get +1/+1.
{T}: Target Merfolk creature can't be blocked this turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
6 printings · $0.59 to $12.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Merfolk vs. Goblins | 11 | Rare | $0.79 | — |
| Explorers of Ixalan | 10 | Rare | $0.69 | — |
| Jumpstart 2022 | 321 | Rare | $0.69 | — |
| The Lost Caverns of Ixalan Commander | 164 | Rare | $0.59 | — |
| Magic 2010 | 62 | Rare | $0.79 | $12.99 |
| Magic 2011 | 65 | Rare | $0.59 | $7.99 |
One ruling from Wizards of the Coast
- 1 October 2009To have any effect, Merfolk Sovereign's activated ability must be activated before the declare blockers step begins. Once a Merfolk has become blocked, activating Merfolk Sovereign's ability won't change that.