Memory Jar This is just plain good by itself as it usually is 7 cards to choose 2-3 from for me and none for you. But it combos so well with Megrim, Sudden Impact, and a fist full of other cards that is a boldo winner. (Editor's Note: The key phrase here is "it combos so well with...". That's how cards get banned now.
Phyrexian Reclamation is the creature cycler of choice. It's like a necro only more selective.
Angels Trumpet Think Propaganda and remember creatures that come into play usually have summonsing sickness and can not attack.
Deranged Hermit This is too easy to cycle by not paying echo and bringing it back with say Phyrexian Reclamation for 8 2/2 creatures.
Second Chance Sacrifice this card and take an extra turn seems fair being there is no way to return an enchantment to your hand.
Brink of Madness Mind Twist wasn't too strong so lets do it every turn.
Karmic Guide Okay, have you figured out how to recycle enchantments with you monk Idealist yet?
Avalanche Rider Kill a land for 4 mana seems okay but lets get a 3/3 creature which can be recycled easily with echo and is unaffected by summonsing sickness.
Slow Motion I have missed all those prison decks so lets say hello to Winter Orb.
Tinker Nothing makes things fly like getting to search your library for what you need. Now, if only there were some good artifacts.
Honorable mention: Quicksilver Amulet I like creatures if you do not have
to cast them.
Worst Card Scrapheap Wasn't this an Antiquities common which no one