Talsen, Horizonwalker

When Talsen, Horizonwalker enters the battlefield, create X 1/1 bird tokens with flying
where X is you devotion to white and blue.
{w}{t} Birds you control get +3/+3 until end of
turn.
{u}{t} Birds you control can't be blocked this turn.
{w}{u}{t} Exile Talsen, Horizonwalker, then return
him to the battlefield tapped.