Portal to the Past

(As this Saga enters and after your draw step, add a
lore counter. Sacrifice after III.)
I — Create a colorless artifact token named Mox
Sapphire. It has "{t}: Add {u}."
II — Target player draws three cards.
III — Take an extra turn after this one.
If Portal to the Past would be put into a
graveyard from anywhere, exile it instead.