Here's how the decks at the Pro Tour break down
DON'T counter ramp cards (Kodama's Reach), single-use tutors (Demonic Tutor), random fatty creatures that don't have a threatening enter-the-battlefield trigger and can't attack through your drakes (Wurmcoil Engine), or anything you can deal with using a bounce spell already in your hand DO counter fatties that can't be chumped blocked by drakes (Blightsteel Colossus) if you don't have creature removal in hand, cards that make future counter magic a pain to cast (Hall of Gemstone), anything that generates excessive amounts of card advantage (Greater Good), or any card that you know has a tendency to win games in short order (Prophet of Kruphix)
If you decide to activate it for some silly reason, it'll try to present you with a list of colors to choose from to add to your mana pool, find an empty list since you have no commander, and finish resolving without doing anything at all
This is a mashup of Leyline of Anticipation and Shimmer Myr
If multiple creatures enter the battlefield at the same time, evolve may trigger multiple times, although the stat comparison will take place each time one of those abilities tries to resolve
