Psychosis results in each opponent discarding two cards while sickness gives all creatures your opponents control -2/-2 till the end of the turn
Verrak, Warped Sengir Verrak, Warped Sengir is a unique commander that wants you to pay life, and lots of it, to double up your activated abilities
10 yen per card, no matter how many cards you buy
And if you play it in EDH, it becomes a nasty win condition alongside a couple of wheels
One of its major weaknesses is that spells may only be countered once, and that once is when they're cast, so you've got to have the mana, or you may just end up getting beaten by the one card that you didn't counter if you can't dig for your Sphinx fast enough, (though the Into the Roils do provide a countermeasure to this)