Teutoburg Forest

Enters the battlefield tapped.
{t}:Add 1 {g} or {b} mana to your mana pool.
{1}{b}{g},{t}: Destroy target token creature.
3 legions marched into Teutoburg Forest. Not a single came out.
"Damn you, Varius, give me my legions back!"
- Augustus, on hearing of the defeat.