Mystic Cancelation

Split second (As long as this spell is on the stack,
players can't cast spells or activate abilities that aren't
mana abilities.)
You may choose one of the following. If you
don't, counter target spell with split second.
Ignore all other split second abilities on the stack.
• Counter target spell. If it is countered this way,
exile it.
• Search your library for an instant or sorcery
card, reveal it and put it in your hand. Shuffle
your library after.