River Boa
Mana cost {1}{G}. Power/toughness 2/1.
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
{G}: Regenerate this creature.

River Boa is a green card, legal in Premodern, shown in its old-frame Sixth Edition printing.
Price and printings: Cardmarket (€0.27) · TCGplayer ($0.34) · Scryfall
Tracked daily since 16 September 2026: on Cardmarket between €0.22 and €0.29 in that time.
How often River Boa is played
River Boa is maindecked in 2 of 142 tournament decks in this archive (1%), averaging 3.0 copies.
Counting only the 66 decks that can cast green cards, 2 of them play it (3%).
See how it compares on the Premodern staples list.
Tournament decks with River Boa
- Superstompi: 13th Place at Nantuko League - Octubre (2× mainboard)
- Rogue: 1st Place at Secrets Makuhari 2026 (4× mainboard)