I think the downside is that it might not have a lot of playability outside of Commander
Along with that it reads: Whenever The Gitrog, Ravenous Ride deals combat damage to a player, you may sacrifice a creature that saddled it this turn
Not terribly strong as you bat commander but excellent in your 99, you really only need to empty one opponent's hand (find the aggressive player) and you'll be ready to return the Temple of the Dead flip land to the card drawing, token generating, life draining bat, and rule the table
Some examples of this are cards like Alms of the Vein or Alchemist's Greeting, which arent really good cards for their original costs
Two examples are pictured above: Call the Spirit Dragons and Dracogenesis are two enchantments that are all about Dragons
7 Mirri, Weatherlight Duelist You Decide How Combat Is Going Mirri, Weatherlight Duelist makes it so that each opponent can only block with one creature when she attacks or only attack you with one creature when she's tapped, making it difficult for your opponent to prevent and deal damage
