The downside here is that players are aware of your intentions the moment you reveal your black commander that deals in poison, and its usually not fun to be everyone elses enemy
Agro decks are particularly vulnerable to this and can often lose to one lame card like a Moat or something
Two life actually hurts, as do lots of other things in the cube, friend and foe alike
If you want an X-spell that converts all your spare mana into tokens, you cant do better than Forth Eorlingas!, which not only spits out hasty, trampling tokens but gives you the monarchy
In it, we got an impressive amount of art from the set to give us an idea on what is coming
By making creatures without flying unable to block, it turns a cluttered board into a clear path for a lethal swing