Boreal Aurora

Look at the top ten cards of your library. Exile up
to three cards from among them face-down and
put the rest on the bottom of your library in a
random order. Until your next turn, you may
play those cards without paying their mana costs
and as though they have flash. Exile Boreal
Aurora.
The power of the seasons collects over Halydice in a brilliant display of what is possible if only they worked together.