Dreams of the Old One

Devoid.
When Dreams of the Old One enters the game, target player discards X cards where X is half the mana used for {x}.
Whenever a player other than the owner of this card discards cards, put that many Awakening Counters on Dreams of the Old One.
Awakening Counters may only be added or moved to this card by the effects of this card.
When this card has 10 Awakening counters you win the game.