They remember
Whenever an opponent sacrifices a noncreature token, that player gets two poison counters
Making matters worse, to support backup commander Zaxara, the Exemplary, the deck also has some random X-spells that are not especially playable as well as creatures like Hungering Hydra and Vastwood Hydra, which don't do much to support the primary mutate theme (other than possibly add a creature with some +1/+1 counters to the battlefield to mutate on)
Hope you guys enjoy the deck, and I hope that this might be a competitive option for some players who want to build a great deck but not break the bank!
When the next restricted list announcement rolled around, a pretty unheard of number of cards were simultaneously added to the Vintage Restricted List: Crop Rotation Doomsday Dream Halls Enlightened Tutor Frantic Search Grim Monolith Hurkyls Recall Lotus Petal Mana Crypt Mana Vault Mind Over Matter Mox Diamond Mystical Tutor Tinker Vampiric Tutor Voltaic Key Yawgmoths Bargain Yawgmoths Will This list included most of my deck (every card but Force of Will, Defense Grid, and City of Brass would end up restricted at some point), as well as lots of other cards that were part of other broken decks that were feared to be the next to rise up
