Book of Parables

Instant and sorcery spells you cast cost {1} less to
cast.
Whenever you cast an instant or sorcery spell,
put a counter on Book of Parables. Then if there
are four or more counters on it, you may remove
those counters and transform it.
"The whole earth will be destroyed, and a deluge is
about to come upon the whole earth, and will destroy
all that is on it."