The Second Sliver of Red

{p/u}{p/g}{2}{t}Counter target spell that targets permanent you control.
Opponents can only cast one creature, one instant,
one enchantment, and one sorcery per turn. When The First Sliver of Red, The Second Sliver of Red, The Third Sliver of Red, and The Fourth Sliver of
Red are on the battlefield, you can cast all exiled
cards without paying their mana cost