Shock, Controlled Chaos

If you casting or copying an instant or sorcery spell causes
a triggered ability of a spell or permanent you control to trigger except Shock Controlled Chaos, that ability triggers an additional time.


Whenever you cast an instant or sorcery, if it is the fourth spell you cast each turn, it has cascade (When you cast your fourth spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on th