Either way, Ursula, Sea Witch is a great card for neutralising strategies that are built on readying and/or exerting cards
The more colored cards youre using in your sideboard, the more likely you are to want seventeen lands since it usually means four of them are Glimmervoid
There are plenty of cards beyond these that will serve you well if youre drafting, and can be used in a few Commander decks too, but these ones are generally more useful across the board
Moonshaker Cavalry Any card that can reasonably be compared to Craterhoof Behemoth is bound to rank highly, and Moonshaker Cavlary certainly fits the brief
This is a very different experience, as Ursula's turns work differently than a player's normal turn
A tremendously powerful card with four strong chapters, this card can easily win the game for you on its own, especially in Commander if youre running a dedicated colorless build thats full of high-mana colorless bombs like Ugin, the Spirit DragonUgin, the Spirit Dragon or Eldrazi Titans