Captain Lannery Storm
Ixalan — rare
Legendary Creature — Human Pirate
Captain Lannery Storm rulings:
2017-09-29: You can activate the mana ability of a Treasure even if you have nothing to spend that mana on.
2017-09-29: Captain Lannery Storm's last ability triggers whenever you sacrifice a Treasure for any reason, not just to activate a Treasure's mana ability.
2017-09-29: If you sacrifice Treasures to cast Captain Lannery Storm, its last ability won't trigger for those Treasures.