Aberrant Aether Channeler Agent of Treachery Alquist Proft, Master Sleuth Architects of Will Armorcraft Judge Azor, the Lawbringer Baleful Strix Barbed Servitor Barrin, Tolarian Archmage Battlewing Mystic Bazaar Trademage Be'lakor, the Dark Master Beastbond Outcaster Bedlam Reveler Biomechan Engineer Blade Juggler Bladecoil Serpent Blood Servitor Bloodcrazed Socialite Bloodtithe Harvester Bonny Pall, Clearcutter Bookwurm Borborygmos and Fblthp Briarbridge Tracker Broodlord Caldaia Strongarm Callous Bloodmage Carnage Interpreter Carven Caryatid Cavalier of Flame Cavalier of Gales Cephalid Sage Champion of Dusk Champion of Wits Charming Scoundrel Chronicler of Heroes Circuit Mender Citanul Woodreaders Clackbridge Troll Clattering Augur Clive, Ifrit's Dominant Clockwork Servant Cloud of Faeries Cloudblazer Cloudkin Seer Combat Thresher Combustible Gearhulk Common Iguana Conciliator's Duelist Coralhelm Chronicler Crackling Drake Crypt Lurker Cultivator Colossus Didact Echo Discerning Peddler Disciple of Bolas Disciple of Freyalise Discourtesy Clerk Doom Weaver Dormant Sliver Drownyard Explorers Dusk Legion Zealot Duskana, the Rage Mother Eagle of Deliverance Earthshaker Dreadmaw Echo Inspector Echo of Death's Wail Elite Guardmage Elite Instructor Elvish Visionary Errand-Rider of Gondor

Playtest cards are not carefully balanced and often use basic to extravagant effects , meaning the power level between them varies greatly
I think I like the aforementioned MID card better, but sometimes a mid card is what fills the slot best
For each other permanent you control, Botanical Brawler will count +1/+1 counters having been put on that permanent at any time during that turn, even if Botanical Brawler wasn't on the battlefield at that time