Archivist of Oghma The problem with Stax cards that prevent certain actions, like Aven Mindcensor, is that while you might get the drop on one player, from then on your opponents can play around your card until it's removed
Being able to cast it at any time is important, because of the big chunk of text attached to it: When Orcish Bowmasters enters the battlefield and whenever an opponent draws a card except the first one they draw in each of their draw steps, Orcish Bowmasters deals 1 damage to any target
Second, being more expensive can be an advantage to a threshold card because that gives you time to get the requisite cards into your graveyard assuming that you're being rewarded for all your extra effort
8 Heralds Horn You Never Know Whats Coming Next As the standard for great kindred cards, Heralds Horn is almost an auto-include in any deck focusing on a specific creature type
The thing about it is that there are no restrictions on what kind of creature you can destroy with it and you gain life equal to the creatures toughness
Silk, Web Weaver Id be much more interested if Silk, Web Weaver made spiders, but Human Citizens will do