Right away, it creates friction by making all nonbasics enter the battlefield tapped, slowing down opponents who stretch their colors
2 Riders Of Rohan "Spear Shall Be Shaken, Shield Be Splintered" Taking their rightful place as inheritors of Middle-earth are the Humans, finally united in a common cause
Generally, theyre on a creature cards, like Emeritus of Ideation, though theres nothing saying that that is an exclusive feature
Having these makes you more able to play pricier supporting cards like Time Warp
Now lets add Jhoira, Weatherlight Captain, one of the best artifact commanders in the game, drawing you cards for each artifact you cast and thus giving you additional resources and spells to cast