Bubno, Sand Terror

When you cast a permanent with converted mana
cost 5 or more, search your library for a
permanent with converted mana cost 5 or more
and put it onto the battlefield.
When you cast a instant or sorcery with
converted mana cost 5 or more, search your
library for a instant or sorcery with converted
mana cost 5 or more and you may play it without
paying its mana cost.