Trinity Shield is a passive item.
- Isaac uses a shield to block shots.
- The shield stays in the same direction until Isaac fires in another direction.
- The shield can block diagonally by holding down 2 arrow keys at once.
- Tears will be fired vertically while the shield is at an angle.
- The shield can't block beams or explosions.
- The shield can be held in any direction if you're using a joystick.
- Many items change the shield's color as if were a tear or another weapon, but the change is only cosmetic.