It's a three-drop 3/3 to swing and block, and then you can sacrifice it for two and a tap to Wheel of Fortune, an ability so powerful and iconic that an entire Top Ten Commander archetype is named after it
If the player takes damage while their deck contains zero cards then cards will not move to the Damage Zone but Auto Abilities such as that used by [18-075R] Siefer, worded as each time you receive one point of damage, will still trigger
I don't believe this iteration on Niv-Mizzet is as powerful as some previous versions of the creature, but that isn't keeping the Dragon Wizard's price down all that much
(And then, of course, if you had Proclamation of Rebirth to bring it back
The two goblins walk down the stairs to find Grenzos minions razing the house, looting and destroying everything
You can use Suspend on a creature you control to have it blink and get another bonus from entering the battlefield