Kozilek's Command offers multiple options, primarily creature removal and an additional benefit like drawing cards, exiling cards from graveyards, creating chump-blocking Eldrazi Spawn for fodder, or casting it for as little as 5 mana (low for this deck, of course), which is a big advantage for future turns
In some cases, you can use Sinkhole to destroy a site, set your opponent back, and if your opponent isnt careful with where they cast their minions, you can follow up with Cave-In , Stormy Seas , or Earthquake to remove multiple cards from the realm devastating your opponents board while setting them further behind in board presence
You can activate one ability of a planeswalker you control once a turn, but only during a main phase when you would cast a sorcery
A counterfeit is trying to mimic a real card as closely as possible
If another effect modifies how much damage a source would deal to an opponent or a permanent they control, including preventing some of it, the player being dealt damage or the controller of the permanent being dealt damage chooses an order in which to apply those effects