We even started Scars of Mirrodin design with poisonous as our Phyrexian mechanic, but playtests showed that players tended to die to the damage before the poison
You will need to alternate between Psydrive and Psychic Sphere while adding more Energy to the mon, and I dont recommend putting them into your Active Spot until they have at least five Energy on them, so you can at least use Psybeam twice in a row and hopefully sweep through your opponents Pokemon and get ahead of them in terms of Prize Points
Gruul has a fair number of haste matters cards like Samut, Vizier of Naktamun and trample matters cards like Quartzwood Crasher
Gleeful Arsonist catches my attention, since it can deal out some serious damage if you can pump its power
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Overall, Gholdengo is likely to be among the best decks going into 2025, as it can knock out almost every Pokmon with one attack and it does not lose many cards from rotation