Sword of the Ages: Now you're just pulling my leg, right
That ability lets you pick once from four different effects: tapping or untapping a permanent, dealing 3 damage to each opponent, copying an instant or sorcery, or (presumably your last choice) putting Gandalf back on top of your deck
I also felt the deck always had game against every strategy we played against on stream
You can use it to maximize value by pointing it at a player that owes you a favor, or you can give another player an opportunity to do something for you
Silas Renn, Seeker Adept has built-in recursion, which is great for reusing Tormods Crypt or Nihil Spellbomb
This creature type doesn't have a main trait of ability, instead offering a wide range of powers for you to play with