Sacrifice decks especially like this, but any white deck can play it and just draw cards when creatures trade off in combat
The other difference is that Sovereign Okinec Ahau must personally attack to reap the benefits, so Commander players should protect it with good enchantments or equipment cards like Mithril Coat
By including some of the best green card draw MTG has printed throughout the years in your deck, you will greatly improve your gameplay experience
Tyrant's Familiar [Dragon deck]: It makes sense for it to be a seven drop since you will only be able to control a heavy-casting commander mid to late game
These two cards go back and forth for free, pinging the opponent to death as Ob Nixilis grows bigger
In fair decks, you get cards and an ally, except for Cut a Deal, which seems the most sketch