When Hildibrand Manderville dies, you may cast it from your graveyard as an Adventure until the end of your next turn
Personally, it really feels like Wizards is really stretching to make this one work, and it shows
Protection from white (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything white.) Unchained Berserker gets +2/+0 as long as it's attacking
Everything that is specified by the effect creating the original token or tokens will also be true about the additional token or tokens created by Doubling Season's replacement effect
If you Station the card with one charge counter (tap a creature you control, put charge counters equal to its power on this Spacecraft), its first ability activates
This rare card is one of the best to have in your hand in the early game