It also makes 'black and red spell considered colorless damage', which is a rather specific way to prevent them from being countered by counterspells that cares about a specific colour
Sure they all trend aggressive, but each color combination can grind out a long game as opponents durdle with Adventures and milling
I discovered Merieke Ri Berit, my favorite commander so far, by playing Tiny Leaders and later turning her into an EDH deck
Teferi, Mage of Zhalfir Teferi, Mage of Zhalfir is another Commander staple that dominates games on its own when unanswered
In a five-color deck, getting any color of mana right away is vital
while the original suite of Mercadian Masques mercenaries are cool, most of their abilities are locked into the tutoring mechanic in that set