Include a mix of different types, generations, and strategies
Sylvan Scavenging
Obviously, there are the usual Simic +1/+1 counter strategies, but you can also use Krajs ability to give it the activated ability of a creature that untaps itself, thereby creating an infinite loop
The final set to include EX cards was XY: Evolutions , which was mostly a Base Set reprint except for the inclusion of these Ultra Rare cards, which added some much-needed spice to the set
Nocturno of Myra's Marvels Nocturno of Myra's Marvels works pretty well when you name the word destroy. While turning a bunch of your removal spells into card draw might seem underwhelming for a commander, Nocturno does have partner
As this can only happen once each turn, Ramos requires a good amount of flash spells and instants to get the most out of them, eventually creating a massive mana engine for constant spellslinging