Forerunner of Alora

When Forerunner of Alora enters the battlefield,
you may search your library for a Dragon card,
reveal it, then shuffle your library and put that
card on top of it.
Whenever a Dragon enters the battlefield under
your control, you may exile the top card of your
library. You may cast cards exiled this way as
long as a Dragon you control has dealt combat
damage to an opponent this turn.