**TL;DR** Don't go swimming in an ice covered lake planning to climb up a ships anchor if you can't swim or climb
A dwarf druid decides to stealthily board a ship that swims in a frozen lake. For that they break the ice, cast a sphere of air around them and their snake companion and jump into the ice cold water - protected for an hour. They then walk the long walk, recast the sphere and stand in front of the anchor. Swimming up after stopping the sphere is unlikely as they can't swim. So they try to climb the anchor. They fail because they can't climb. They fail again and again and again and again. Bruised and nearly out of mana they decide to go back. However, it is quite difficult to find the entry point in a **frozen** lake. When they finally do, they realize that they can't reach the entry point, because it is 2 and a half meter above the lakes floor as they went in a bit before breaking the ice. As the mana runs out they decide to stop the spell and swim up. But low and behold they still can't swim, fail miserably even though they got like 5 tests to make it by the generous GM and die together with their companion under the ice.
They went without telling anyone so nobody was there to get him out or to help in any other way...