Artificer's Intuition [Fifth Dawn]

Artificer's Intuition [Fifth Dawn]Set: Fifth Dawn Type: Enchantment Rarity: Rare Cost: {1}{U} {U}, Discard an artifact card: Search your library for an artifact card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

I honestly don't know

Set: Global Series Jiang Yanggu & Mu Yanling Type: Instant Rarity: Common Cost: {1}{U} Return target creature to its owner's hand

Set: Commander 2014 Type: Artifact Rarity: Rare Cost: {6} As Caged Sun enters the battlefield

When Supply-Line Cranes enters the battlefield

Set: Innistrad Tokens Type: Token Creature — Wolf Rarity: Common

Set: Alara Reborn Type: Enchantment Rarity: Rare Cost: {3}{R}{G} At the beginning of each opponent's end step

Set: EX: Power Keepers Type: Water Rarity: Common Retreat cost: Colorless

Set: Guildpact Type: Instant Rarity: Rare Cost: {2}{B}{B} Destroy target nonwhite

Set: Fourth Edition Type: Instant Rarity: Common Cost: {X}{U} Counter target spell with mana value X

Set: Premium Deck Series: Slivers Type: Enchantment Rarity: Rare Cost: {4}{G}{G} Whenever a creature enters the battlefield

or being stabbed in the back

the brains required to use them are worlds apart