Castle Highstrike

{t}: Add {u}, {b}, or {r}
{2}, {t}: Search your library for Sensaris
Guard, put it into your hand, then shuffle
your library
{4}, {t}: Cast a instant or sorcery from your
hand with mana value less than or equal to
the number of Magi you control
The imperious castle sits above Arcana. The domain
of the modern Highstrikes.