If you find you own one of the most expensive MTG cards, the first thing you're going to want to do it put it in protective sleeves
There are countless Commander decks that would love to have access to this absolute house of a card, and I can think of two or three alone in just the decks I like to play
Its hard to really call Ob-Nob draw hate since thats entirely tied to a -8 ultimate, but that ability kills a player quick if you ever pull it off
All things considered, its a free sac outlet and in a good color combination for this archetype
To decide what colors you will be playing, you'll want to look for massive threats
If it takes damage at all, it can shut your lifegain off permanently, which is essentially game over in most scenarios