Where its at its best is on turn one helping you cast a ton of mana rocks, your Tymna, or a Rhystic Study, or slightly later, maybe on turn three, where it helps you double or triple spell some of your most impactful (but more expensive) cards
The damage to make Treasure tokens has to be from combat damage , meaning dealing damage with Captain America's effect will not create Treasures
Once per turn is limiting but this can still let you start slamming multiple spells per turn which is what you want to be doing
it's an ultra-rare artifact from the game's creation
Agent Venom Alien Symbiosis Behold the Sinister Six
all you need to know for Swinging Ship is you need to open the attraction, roll a 6-sided dice, and get a 2 or a 6 during your first main phase, and then you get an additional combat phase after your first one