(The copy becomes a token.) If a creature spell is copied, it's put onto the battlefield as a token as the spell resolves rather than putting the copy of the spell onto the battlefield
It's not immensely, but it's advantageous to hide cards like this in your manabase without sacrificing the consistency of your land drops
But things are different this time
Ink-Eyes, Servant of Oni (Regenerate Black Creature) Whenever [c]Ink-Eyes, Servant of Oni[/c], deals combat damage to your opponent, you can take a target creature card from that players graveyard onto the battlefield under your control
You just keep moving your equipment around, either drawing a card or putting lands into play each time you do, until you eventually win with a convoluted loop that involves sacrificing your lands to Sylvan Safekeeper, shuffling everything back into your library with Endurance, and then eventually blowing up all your opponent stuff with the Zur or bouncing all their permanents with a Teferi while also creating like a million tokens along the way