Tlincalli Hunter
{5}{G}{G}Creature — Scorpion Scout
Trample
Once each turn, you may pay {0} rather than pay the mana cost for a creature spell you cast from exile.
Tlincalli Hunter // Retrieve Prey
{5}{G}{G} // {1}{G}
Creature — Scorpion Scout // Sorcery — Adventure
Oracle Text
Retrieve Prey
{1}{G}Sorcery — Adventure
Exile target creature card from your graveyard. Until the end of your next turn, you may cast that card. (Then exile this card. You may cast the creature later from exile.)