Interesting, but on what grounds will you personally execute your teammate? And without your vote, Undine and the Mage King together won't be able to do it.
But the point is to provide guarantees, as Hermit already wrote.
You won't be able to block for two days in a row.
I miscalculated the moves. Okay. If Ellina doesn't believe my honesty on her word, I suggest a longer, but more reliable option:
1. Today, we execute TaKo (Whirlwind will take over her Night Defense and won't be able to commit murders).
2. At night, Undine blocks Sky.
3. Night Night Vote (NNV).
4. Nothing happens at night; the block is still in effect; there's no one to redirect the Night Defense to.
5. NNV.
6. At night, we block Sky again.
7. We execute the Wizard.
8. Empty night.
9. We execute Sky.
10. We block Whirlwind.
What do you think?
You're alive as long as they don't execute you the next day.
That's a lie. Under these circumstances, the game automatically ends; there is no execution.