Davy Jones

Davy Jones has indestructible.

Krakens, Octopus, and Leviathans have islandwalk.

When Davy Jones enters the battlefield, put a counter on target creature you control. If there are no heart counters on the battlefield, sacrifice Davy Jones.

When Davy Jones deals combat damage to a play, mill the top five cards of your library. You may cast target Kraken, Octopus, or Leviathan among them onto your battlefield tapped, without paying its mana cost.