Library of Leng [Collectors' Edition] Siren Pirate Set: Eventide Type: Enchantment Rarity:

Set: Eventide Type: Enchantment Rarity: Rare Cost: {3}{W} When Endless Horizons enters the battlefield

Set: Eternal Masters Type: Artifact Rarity: Rare Cost: {2} Imprint — When Isochron Scepter enters the battlefield

except it's an enchantment in addition to its other types

which allowed the myr to observe everywhere unhindered

Library of Leng [Collectors' Edition] Siren Pirate Set: Eventide Type: Enchantment Rarity:Set: Collectors' Edition Type: Artifact Rarity: Uncommon Cost: {1} You have no maximum hand size. If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.