Mono White
White is the color of order and justice in the multiverse. Mono whites strongest themes include: tokens, white weenies, removal, tax and other hatepieces and multiple ways to level the battlefield. White has definitely received a lot of attention from WoTC in the previous expansions and will likely receive new strong staples in the future, too, as EDH is the most popular format in MTG.
Mono White themes
+1/+1 counters
White has many great support spells and permanents for +1/+1 counters theme. Counters theme is often combined with White-weenie or token strategy and turns the small creatures into a formidable force.
Tokens
Mono white token decks aim to create a mass of small creature tokens and then with anthem effects or +1/+1 counter defeat the opponents in combat. White token decks are aggressive decks and aim to flood the battlefield soon rather than later due to the weaker card draw mono white has access to.
Lifegain
Lifegain is one of the the most popular themes in EDH. Multiple triggers to gain life and value received from the lifegain triggers are really fun to follow as a player. Often lifegain is combined with another theme, +1/+1 counters or creature tokens, as pure lifegain is often not powerful enough to win the game.
Voltron
Voltron decks focus on commander damage or a few creatures and turns them into massive, protection-from-everything kind of creatures and finishing off the opponents in combat.
