As a bonus to Leatherhead, Swamp Stalker, it also has trample, meaning the chances of it dealing player damage as a 5/4 creature are already high, and that's before you put any additional counters on it.
The Pro Tour Top 8 being 4 Izzet Cutter and 4 Mono-Red, with Cutter being a huge metagame chunk, means that some bans are inevitable here
After the Vileplume threat is eliminated, you just work on removing any remaining Energy from your opponents field and then take knockouts on the rest of your opponents Pokmon with Darkrai EX
Uncommon 134 Dinner Bell Rare 135 Peter Pans Dagger Common 136 Sword in the Stone Uncommon 137 Alice, Growing Girl Legendary 138 Basil, Great Mouse Detective Super Rare 139 Basil, Of Baker Street Common 140 Basil, Perceptive Investigator Common 141 Caterpillar, Calm and Collected Uncommon 142 Cogsworth, Grandfather Clock Super Rare 143 Cogsworth, Talking Clock Uncommon 144 Cruella De Vil, Fashionable Cruiser Common 145 Cruella De Vil, Perfectly Wretched Uncommon 146 Duke Weaselton, Small-Time Crook Common 147 Gaston, Intellectual Powerhouse Rare 148 Grand Pabbie, Oldest and Wisest Super Rare 149 Hiram Flaversham, Toymaker Rare 150 James, Role Model Common 151 Jasmine, Heir of Agrabah Common 152 Judy Hopps, Optimistic Officer Uncommon 153 Mrs
