Even though I say that lightly, it was in fact a complicated feat to perform. The fact that Merlin mentioned asking Avalon nicely to remove the safety measure within the castle, had me wondering just how much he wanted me to beg. Taking account of that, there was still much to be done. While I had most of the spell crafted, an invisibility and muggle repelling charm would need to be integrated into the ward system. Then Avalon needed to teleport from the ground with little change to the area above it. During that, the levitation needed to be activated at just the right moment for it not to land into the ocean. 