Koth Koth, a vulshok Planeswalker from Mirrodin, uses geomancy to split stone and shape metal in his fight for Mirran peace
The first set featured cards where characters were investigating what appeared to be purple seaweed (Mickey Mouse - Detective and Duke Of Weselton - Opportunistic Official) so it would make sense that the origin of the Floodborn incident came from under the sea
Practically, this means anthems and +1/+1 counters wont get in the way of you drawing cards
While today, we expect reprints on a yearly or even monthly basis, and much of the player base clamors for more reprints of in-demand staples, at the time, the idea of a high-supply reprint set was completely new
It's great in Rakdos with Prosper, or as a Background with Green's Durnan of the Yawning Portal
Because we like to differentiate where we can when two colors overlap in a flavor area, we have decided that blue's milling is nondescriminate