Chaos Altar

At the beginning of each upkeep, you may look
at the top six cards of your library. Exile any
number of instants and sorceries from them,
create an X/X dragon elemental with flying
and haste where X is the total converted mana
cost of the cards exiled this way, sacrifice it at
the end of turn. Shuffle your library.
"The greatest chaos is born from the darkest minds"