Two of them are continuous and have duration until the beginning of the next turn of the Protections controller
On the turn in which the new Johann enters the battlefield, you may use its casting permission once, even if you used the old Johann's casting permission to cast an instant or sorcery spell from the top of your library in that same turn
What's actually most relevant is Sentinel of Lost Lore's good stats as a combat-ready creature on turn three, and its abilities should only be treated as bonuses
But I also think it is completely understandable that its banned in every official MTG play format, even in almost anything goes Vintage
At the very least, Archelos, Lagoon Mystic has a fun new toy to play with
These options allow you to either reduce opponent resources or maintain board control, with the Banish effect synergizing well with your damage Songs like Let the Storm Rage On