Balthor's reanimation of all black and red creatures also brings back your opponent's creatures, so if you're playing against a Goblin or Dragon deck, it may not be ideal
To help you understand what exactly is going on and how the deck wins, let me breakdown the various elements present in the list
There is a lot of untapped dual land action for those that value speed, but tri-lands and Temples are incredibly powerful tools for those that can afford to play it a little slower
I love tempo-shifting cards like this, and the fact that this can be a ritual and a wrath in some decks makes it really good value indeed
Since Dramatic Reversal will trigger Guttersnipe each time, you can deal infinite damage to your opponent
However, Explosive Vegetation is slightly outclassed in modern Commander, and most alternatives offer some additional benefit: Skyshroud Claim can only find Forests, but it puts them into play untapped