Instead of paying for our removal spells, we can just pitch a card with Force of VigorForce of Vigor
There are those that are one off draws like Sphinx's Revelation and Memory Jar and those that are ongoing
Then, when at least one creature with counters on it deals damage to a player, you draw a card and proliferate, meaning that all your creatures with at least one token receive an additional token
They often let other merfolk be played from the library, create merfolk tokens when their allies enter the battlefield, or have ways to protect each other that quickly add up
Building up an orc army, retrieving your best spells from the graveyard, and overwhelming with sheer force, Sauron brings fearsome power worthy of his reputation to Commander