This is pretty much free real estate that you can use to protect your commander if you don't mind the possibility of a colorless land
"You know that secret
By using cantrip and draw effects as well as mana generation cards like Dark Ritual, Black Lotus, and others, it's easy to instantly kill a player without them ever having had a turn
Passion, emotion, and impulse can take many forms in Commander, but they almost always involve the most outspoken color in the pie
for example, your cool counterspell should be blue, your hasty creature is likely red, a card that cares about power is green, and so on
The one downside is that Bhaal does give a semi-permanent buff to your opponents creatures, and theyll only be goaded for one turn