Tsunami Titan

When Tsunami Titan enters the battlefield, tap it and put a +1/+1 counter on it.
{u}{u}, {t}: Put a +1/+1 counter on Tsunami Titan.
{u}{u}{u}{u}, {t}: Remove all +1/+1 counters from Tsunami Titan. {x} amount of target lands your opponent controls become Islands under your control where {x} is the amount of counters removed this way.
Make it angry, and you'll wish you'd drown. Hint: It won't let you go that easily.