Planechase Anthology Planes

Trail of the Mage-Rings

Instant and sorcery spells have rebound. (The spell's controller exiles the spell as it resolves if he or she cast it from his or her hand. At the beginning of that player's next upkeep, he or she may cast that card from exile without paying its mana cost.)
Whenever you roll {Chaos}, you may search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle your library.

Instant and sorcery spells have rebound. (The spell's controller exiles the spell as it resolves if they cast it from their hand. At the beginning of that player's next upkeep, they may cast that card from exile without paying its mana cost.)
Whenever chaos ensues, you may search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

Planechase 2012 Planes

Instant and sorcery spells have rebound. (The spell's controller exiles the spell as it resolves if he or she cast it from his or her hand. At the beginning of that player's next upkeep, he or she may cast that card from exile without paying its mana cost.)
Whenever you roll chaos, you may search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle your library.