Flicker

Flicker is one of the best cards ever printed... I always run 4 of them, for 2 mana you can save anything in the game from, for example that disenchant or something, or you can use it in early games to get rid of pesky slow motions or control magics, or if someone is running a phage you can easily win the game with this bad boy! Definately a must in any white deck ever! Also, anything that comes into play with counters on it can be brought back into play with those, or hell use it to play a turn 3 or 4 towering balloth by usilng it to flip a morph, this card is nuts good.

It can't be used to "save" things the way that another poster mentioned because it's a Sorcery, not an instant. It can, however, save a creature that is afflicted with baleful magicks (Pillory of the Sleepless, etc.). Still a decent card for combo-ing with 'comes into play' (Loxodon Hierarch, etc.) or 'leaves play' abilities (Reveillark, etc.).