While Brionac, Dragon of the Ice Barrier would be banned in the TCG in its pre-errata form before this strategy was released, they can still access Synchros not many other strategies could like Gungnir, Dragon of the Ice Barrier, who offered card destruction while being able to trigger your effects, and Dewloren, Tiger King of the Ice Barrier to put Atlanteans back in the hand for discard fodder
It has an omni-negate as protection/disruption, a bounce 1 when going second, 2 free cards for Gullveig to banish, and 4000 added damage to OTK an empty board with Odin, or Gullveig + Loki/Thor
I baited them into using Borreload Savage Dragon's negate with the draw effect of Pantheism
WGR is a beefy wall that summons itself for free if you control a Brave Token OR control no monsters, both of which are easily doable
Starting at 2,500 attack, Chaos Archfiend gains an additional 2,000 attack if a card was banished that turn, and allows you to attack all your opponent's monsters, banishing any monsters that are destroyed by battle
Cannot be destroyed by battle