5-Color Commander Payoffs Five color commanders mean you always have access to a 5-color card, so simple benefits for controlling more colors optimizes cards like Soul of Ravnica, Dragonfire Blade, and Case of the Shattered Pact
It bounces each creature with toughness lower than the number of islands you control
BPhillipYork: This is a big dumb colorless haymaker for Eldrazi decks, and it's awesome
Suddenly all those high-toughness creatures like Aegis Turtle and Caelorna, Coral Tyrant become fast wincons by tapping and milling players out
Valki, God of Lies, is a 2 mana, 1 and 1 black for a 2/1 Legendary Creature God
I still remember one of my earliest Standard experiences, back when the Alara block was legal