If you want to ramp then the green options typically outclass the Simic ones, if you want to draw cards or counter spells then it is the mono blue cards that are top of the pick list
Testing Survival of the Fittest MTG proxy can help you decide whether it belongs in your deck, cube, or casual playgroup before you commit to the slot
Were going to want to copy spells quite a bit in this deck, which is where the TARDIS and the sonic screwdriver can help
There are enough good legends now for a U Devotion build that I could totally see there being a good Rona deck that takes advantage of leveraging Mox Amber to build up your devotion fast and then later win you the game as a combo piece
Speaking of Lord of Change, there are very few cards in the game that have such a strong enters the battlefield trigger
Pay the entwine cost to pick both options, and youve won the game