Sounds like everyone's powers are on the fritz out here; I wouldn't take it too hard.

[ Besides, it all worked out. Steve's single spell that he knows managed to work when he needed it most.

It doesn't seem that a giant turtle is enough deterrent for a predator like the leviathan, but Steve's hopeful that they've scared it off at least for a little while. At Garrus' question, he takes a moment to consider before shrugging. ]

Hard to say. I can take first watch, though, in case it does decide to come back. You should get some rest.