The first 2 pics are the external black border of a fake Revised dual land (an Underground Sea) and the border of the real one
The loop fuels more plays
As for Ral Zarek, himself, I kind of imagine him seeing moderate success as a random one- or two-of in some U/R/x control decks, but more interestingly, I imagine someone building a new kind of blue aggro or midrange deck that actually takes advantage of Ral Zareks ability to remove blockers or do six to the face
Fae of Wishes A key part of stuff to do with your almost infinite mana in Omnath, Locus of Creation decks when that was legal in Standard for a microsecond, Fae of Wishes sees the most play these days as a flexible part of Rona, Herald of Invasion combo decks in Pioneer
Urza, Lord High Artificer As annoying to play against in the 99 as it is from an opponents command zone, Urza, Lord High Artificer is the most popular mono-blue commander for a reason