Two mana for some removal, swing in with a single Dragon, and bing bang boom, you've got an extra Dragon which ShockShocks stuff for every Dragon you attack with
Even if you ignore the sideboard trick, it can still pump out 0/1 tokens to chump block or feed other effects
Master Effect: When entering, return a target spell or permanent to its owner's hand, disrupting opponents
Between cards that Conjure the Power Nine into existence and those that break color identity rules, its very easy to find over-the-top cards
With these, you can potentially create a one-sided-effect by eliminating all of your opponents creatures while leaving yours intact
Aesi is effectively the ramp and the payoff in one package, letting you play extra lands and drawing you a card for each one