Nameless Stormstrider

{u} mana does not empty from your manapool between phases. Nameless Stormstrider's power and toughness are equal to the amount of {u}
mana in your manapool.
As long as Nameless Strider's power is less than
5, it has hexproof. As long as Nameless Strider's power is more than 5, it can't be blocked.
The storm is calling. Better not answer.