212 cards are priced from $0.13 to $3278.76
The more actions people have to take the more likely, players will either miss a card or disengage with the activity entirely and you want to minimize that
Im a big fan of these decks that use Brainstorm, Deathrite Shaman, and fetchlands
If your deck happens to be playing Eternal Scourge, Misthollow Griffin, Torrent Elemental, or Squee, the Immortal, you might consider Altar of Bhaal if black is in your color identity
It doesnt take that long to close a game, so it might not make the game about a lot of combat steps, but its a great blocker and an attacking threat thats worth protecting with counterspells, which is a line that youll often have to cross to get blue players interested in this sort of thing
But at the end of the day, its a 2-mana 2/1 that needs other creatures to function