Cards like High Noon completely stop Ruby Storm and other decks that look to pop off in a single turn
Legendary Creature - Human Soldier Avatar Summon: Kujata (As this Saga enters and after your draw step, add a lore counter
I recognize her as a successful Pokmon TCG veteran, who now works for Pokmon
Red would mean Guttersnipe also downshifted to common! and Purphoros, God of the Forge could shoot down life totals and Storm-Kiln Artist gives you another mana accelerant on top of your commander
Any counter-doubling effect can double poison counters so long as the doubling effect actually affects counters being placed on a player, like Vorinclex, Monstrous Raider
For example, if the target permanent is an artifact creature, you'll stop as soon as you reveal a card that's an artifact or a creature