Thought Lash
{2}{U}{U}
Enchantment
Cumulative upkeep--Exile the top card of your library. (At the beginning of your upkeep, put an age counter on ~this~, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
When a player doesn't pay ~this~'s cumulative upkeep, that player exiles all cards from their library.
Exile the top card of your library: Prevent the next 1 damage that would be dealt to you this turn.