Uumuu, Adventuring Jellyfish

Whenever you cast a instant or sorcery spell,
Uumuu explores. This ability triggers only once
each turn unless you have 6 or more instants
and/or sorcery cards in your graveyard.
You may look at the top card of your library at
any time. You may cast instants and sorceries
from the top of your library as long as you have 6
or more instants and/or sorcery cards in your graveyard.