Tidewalker enters the battlefield with a time counter on it for each Island you control. Vanishing (At the beginning of your upkeep, remove a time counter from this creature. When the last is removed, sacrifice it.) Tidewalker's power and toughness are each equal to the number of time counters on it.
![Tidewalker [Planar Chaos]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/products/85a26509-e4e8-5930-8f93-5217290f9f4a_cc702379-75b2-40fa-8600-8570939bba14.jpg?v=1698571400&width=1445)