Obelisk Fashioner

When Obelisk Fashioner enters the battlefield,
you may search your library for an artifact card
with converted mana cost {3} or less and put it
onto the battlefield tapped, Then shuffle your
library.
Innestra was infuriated with how the obelisks kept
popping up one after the other, how were they made?
where did they come from? Why did it not seem to
matter how many she destroyed?