Sumnir, The Tower's Protector

Foretell {w}{w}{w}, Split Second & Indestructible
When Sumnir enters the battlefield flip Skorn to True Boyd until Sumnir leaves the battlefield.
{t} Put a +1/+1 counter on Sumnir & gain 1 life.
{w}{t} Remove a +1/+1 counter from Sumnir, put a +1/+1 counter on each other creature you own.
Rising Tide {w}{w}{w}