Flint, Tenacious Colony

Fortified 3.
When Flint enters the battlefield, choose one:
- Add one mana of any color to your mana pool.
- Gain control of target nonland permanent with converted mana cost one or less.
{t}: Add {c} to your mana pool.
Though outwardly beautiful, the colonial city of Flint is a storm of tension waiting to be unleashed.