This in combination with Ilharg, the Boar God could finish the game in one turn. Such a combo instantly puts Gruul Stompy in one row with some of the most broken decks in Modern.
The other possibility for Rhonas is Modern Elves, where he would fit in just perfectly, especially taking into account his Vigilance ability.
Opponents won't even try to remove it, since it would be more dangerous to let you replay it for that power doubling effect and just let it stay on board as is.
For more War of the Spark guides in MtG check out the list below: