During the middle game you'll need to resolve your lock pieces and deal with threats that your opponent can present to disrupt your lock
Once per turn, during the End Phase, if this effect was used this turn: Target 1 card on the field
Clarion Conqueror should be an auto-include in any deck with White cards, as long as it isn't turning off your good stuff too
Not only does that allow normally colorless-producing lands to provide black mana, it instantly enables creatures with swampwalk, and notably pairs with another entry on our list, Cabal Coffers
This Sauron provides ample value and offers most of it upfront, which is vital since this 9/9 beater has no protection aside from surviving most burn spells, so it can be exiled or destroyed with surprising ease in Commander
It's not the most fun to resolve or play against, and the games where it is cast are rather silly