All in all, a solid list - our compliments to Wizards of the Coast staffers (Ben Hayes, Dan Emmons, et al.) - love the theme, and the fun factor while playing.
How they use the artifacts varies, from energy synergies to artifact creatures to differently named artifact tokens, but they're all united by that idea
It would be a pretty solid power move to buy one, drink it immediately, then recycle the bottle
1 foil oversize card featuring Regieleki V or Regidrago V
If you still had your Onslaught cards you could basically just take a turn every turn
Karazikar, the Eye Tyrant, Marisi, Breaker of the Coil, Kardur, Doomscourge, Baeloth Barrityl, Entertainer and Firkraag, Cunning Instigator all bring out the worst in opposing creatures