Toluz points to a heavy discard strategy with mechanics like loot, connive, cycling, channel, and the like
What should I do if I find a rare Pokmon card
The extra power and toughness gives you way more ability to attack and block without being blocked off, and the hexproof from monocolored protects you from the most played instant, sorcery and even creature EtB removal spells in the format
Until there's a more recent reprint of Fling in a Standard set, the card itself is legal in pretty much any non-rotating format
Add on top of that evasion, ward, and getting a +1/+1 each time Valgavoth triggers that card draw, and you've got the perfect commander to build a red/black deck around.