Rosethorn Acolyte
{2}{G}Creature — Elf Druid
{T}: Add one mana of any color.
Rosethorn Acolyte // Seasonal Ritual
{2}{G} // {G}
Creature — Elf Druid // Sorcery — Adventure
Oracle Text
Seasonal Ritual
{G}Sorcery — Adventure
Add one mana of any color. (Then exile this card. You may cast the creature later from exile.)