The drawback is that Thundering Raiju itself is only a 3/3, so players will be inclined to drop a counter on it with that first attack
Hajar can be that Commander, and at such a cheap initial cost to play, means you have no qualms about dropping Blasphemous Act, Chain Reaction et al to clear the way for your legends to connect
A Golgari Elf horror for the low cost of three mana, the Abomination of Llanowar is a commander that can serve as a strong offensive and defensive threat with power and toughness equal to not just the number of Elves you control, but the number of Elves in your graveyard as well
Despite its simple mana base and straight-forward game plan (cast Dragons up the curve and attack), the deck has a surprising number of synergies, is more powerful than it first may appear, and is a ton of fun to play
Either way, a 3/4 Flying Lifelink for five that can resurrect creatures every time you go to pass the turn is phenomenal