yugioh level up card Sacrifice Level-Up by AlanMac95 on DeviantArt At the start of your Main Phase 1 that same turn Level Down!? - Yugipedia

Making the Threaten effects only a 2 card inclusion main board, adding a 2 card reanimate package, and making the Wish package 2 cards with more flexibility and actually more useful than that due to reusability, that could add breadth to the deck

Of course, there are a few ways to speed up the process, like using proliferate or cards like Coretapper that allow you to add more counters to Darksteel Reactor

Im not just talking about weird cheerios, either

Incapsula incident ID: 1815000760816943950-678330577750266682

Upgrade (This creature enters the battlefield covering another artifact you control If it can't, exile it Ignore the artifact it's covering Anywhere this card goes, cards underneath it also go It has haste.)