Water Walk to the shoreAn erupting volcano on a smallish desert island is a fine mid level survival hazard. At high level it will likely involve trying to survive on some other plane.
I also don't see why a style has to be present from level 1-20. It's perfectly fine to start of surviving on the island up to level 8 or 9, then transition off the island as you figure out a way off and encounter a much larger island with inhabitants and transition from survival to political. The game has also been character driven from level 1 and I've tossed in a small amount of slapstick just because.
Water breathing and swim off the island
Summon giant birds and fly away.
If Survival stops working at level 5, then Survival isn't supported past level 5.
Consent.Can you explain why this matters? I mean, even not knowing why it matters, illusion is easy. The nobleman touches or examines it and either automatically knows it's an illusion or makes the save and sees through it, or both!