Haevenek, the Foreseer

When Haevenek enters the battlefield or attacks,
scry 1.
Whenever you scry and rearrange the order of
cards in your library, you may pay {u/b} or 1 life. If
you do, scry 1.
"I know that there's the answers, somewhere deep
within the folds of time. I'll search the future for what
I need, and until then there will be no rest."