Myself and a friend of mine once devised a way to turn an actual whale into a club for their epic-level giant character with ~50 strength.
Dig a giant pit, use create water to fill it up, have the druid cast summon nature’s ally to conjure an orca, then have the wizard cast flesh to stone on it.
They were conspiring with the rest of the party to do it behind the DM’s back but they never got around to it.
This isn’t a suggestion, it is a request.
Make it happen people. This world needs the whale mace; and I am giving you ALL the task of making it a reality.
Good luck, and may god have mercy on your souls.
When you first said “club”, I genuinely thought you meant like a nightclub, and I was picturing you casting stone while the whale’s mouth was slightly open and then using the inside of it’s mouth as a goddamn pub