Talos, Draconic Templar

Haste, Vigilance
When Talos, Draconic Templar attacks, look at
the top 5 cards of your library. Put one of them
into your hand, exile the rest
When another dragon enters the battlefield under
your control, if it wasn't cast, it deals twice X
damage divided as you choose among any number
of targets where X is the number of sorceries you
own in exile