Time Sieve needs to be on the battlefield first, and when you begin your upkeep with Thopter Assembly as the only thopter on the battlefield, it will create five 1/1 tokens, which you will use as sacrifices to your Time Sieve
Instead, you get something called 'Wildcards' which you can use to directly craft the cards you're missing for your deck
This artifact card has a very unusual effect
This word obviously has implications with respect to witches, but here it has more to do with creatures with different powers
You can easily rack up five or more Treasure tokens even just by playing it on curve on your second turn
And by removal, Ill be limiting our look to cards with a single impact (as opposed to sweepers, cards that hit all creatures in play, as those are quite different)