Airship rune key

Pressing the rune on this stone allows for an airship of your designs to come through a portal in the sky into your realm. You may only choose the look once. You may only have what you bring on. The ship is alive can speak with you and has autopilot. It has whatever color mist you what coming of the bottom and sides at all times. The ship has 500 health. The ship takes 1 day to return if destroyed. It may have 3 floors at most top deck, lower deck, bottom deck. May be up to 75 ft long and 30 ft wide and 20 ft tall.