Boros Gatemaster

When Boros Gatemaster enters the battlefield,
you get {e}{e}{e}{e}.
Whenever a Gate card enters the battlefield under
your control, search your library for an minotaur
card, put it into your hand, then shuffle your library, if
you got an minotaur card this way, you can cast it
for {e}{e} instead of it's normal casting cost.
{r}{w}, {t}: search your library for a Gate card, put it
onto the battlefield tapped then shuffle your library.