While they are prevented from attacking until there are seven or more cards in exile, he does encourage these effects with an ability that lets you draw cards when one or more cards go into exile from the graveyard or the battlefield
Ironically, I'm not sure where else she fits
While the main purpose of both cards is to keep our creatures on the battlefield through removal, Sejiri Shelter can also help to close out the game by giving Clever Impersonator protection from whatever color of blockers our opponent might have, to get in a lethal alpha strike
In total, the set includes 70 legendary creatures
Note how its any sort of damage, not just combat damage
Though considered 'savage' by the Europeans, the reality is that many of these cultures in the Americas were wealthy, advanced, and mighty in their own right