Its activated ability is a little expensive, but a repeatable Disenchant tacked onto a large turtle hydra gives us lots of board control
Auras you put on other players' creatures are a little bit harder to remember, Mind Control effects are harder to play than normal, and cards which search your opponent's deck (like, say, Praetor's Grasp) are nightmares to resolve
However, at number one, is in fact, the one and only Endurance
This was because white is the best color at making volumes of creature tokens, as it creates a lot of small 1/1 tokens, playing up its flavor as the army color that beats you down with a large number of small creatures
Hyalopterous Lemure Hyalopterous Lemure is somewhat hidden from view, which seems to have been a good choice by Richard Thomas in terms of keeping it cute