Astyanax, Flux Shifter

Flying, indestructible
Whenever an artifact you control becomes tapped, scry X, where X is the number of artifacts you control.
Whenever you draw a card, you may draw from the top or bottom of your library.
Whenever a nontoken artifact enters the battlefield from anywhere, you get a flux counter, then draw a card.
Sacrifice 12 flux counters: Take an extra turn after this one.