Forbidden Book: Blue

Only 1 copy of Forbidden Book: Blue per Library. This artifact has: Cannot be countered by spells or abilities, Hexproof, Indestructible, if put into a graveyard returns to your library.
{2}: Target creature is unblockable.
{2}: Put a 1/1 Merfolk creature token into play.
{5}: Put a 4/4 Air Elemental creature token with flying into play.