Book of Knowledge

Indestructible, This spell can't be countered
All blue creatures you and your partner control
have Vigilance and +0/+2
Every time blue permanent is targeted by enemy spell, draw a card
{4}{u}{t}, draw two cards and discard a card
{10}{u}{t}, as additional cost to cast this ability
discard your hand - draw 7 cards, you may
cast them for half their mana cost, rounded down
each time