The Twin-Wing Guardians

Fortified land has, "{5},{t}: Put two 2/2 blue Drake tokens with flying and haste on to the battlefield. Exile them at the end of the turn."
Whenever fortified land becomes tapped, flying creatures you control get +1/+/1 until the end of the turn.
Fortify {2} ({2}: Attach to target land you control. Fortify only as a sorcery.)