You can pay three mana to activate Infected Vermins main ability, which deals one damage to each creature and player
Once you get a big enough army and experience counters, you can hit hard by activating the ability on Azlask
You get the 100-card deck, usually built around a main legendary commander creature (often with an alternate commander too)
Much like Chaos Warp, that opponent still has the chance of hitting another big spell, but theres a good chance whatever they reveal will be a downgrade in that situation
4 Narset, Parter of Veils / Spirit of the Labyrinth Narset, Parter of Veils, and Spirit of the Labyrinth may not make your opponents spells more expensive, but theyre still some of the most potent taxing options in MTG