Snake Pit (Mercadian Masques #271)

Fosse aux serpents {3}{G}

Enchantment

Whenever an opponent casts a blue or black spell, you may create a 1/1 green Snake creature token.

Illustrated by Carl Critchlow

Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny