I dont see a good home for Hidden Herbalists in Standard yet, but heres a Modern application: Creatures (28) 2 Kird Ape 4 Wild Nacatl 4 Goblin Guide 4 Burning-Tree Emissary 4 Experiment One 2 Ghor-Clan Rampager 4 Reckless Bushwhacker 4 Hidden Herbalists Lands (20) Spells (12) Heroic Intervention can be used in a creature deck to set up a devastating combat phase, whether attacking or blocking
Place your leader card to the left of your deck, leaving a space between the two for your stage card
The tribe's massive diversity does a ton, from destroying a variety of things (Wispmare, Deepfire Elemental, Fulminator Mage, Ingot Chewer, Hateflayer, Tornado Elemental, Cinder Elemental, and don't forget Shriekmaw) to having severely powerful beaters (Verdant Force, Multani, Maro-Sorcerer, Silvos, Rogue Elemental, Liege of the Tangle, Lord of Extinction, Avenger of Zendikar, Thornling, and Root Elemental) to some of the best utility creatures you can imagine (Reveillark, Brine Elemental, Vengevine, Fertilid, Smokebraider, Forgotten Ancient, Stigma Lasher, and Briarhorn) and finally to great control creatures (Dread, Windreaver, Dawn Elemental, Air Servant, Ashen Firebeast, Roil Elemental, and Time Elemental)
The card isnt legal in Modern, so demand is largely dependent on EDH sliver players and casuals
card [presumably] given out at the TMB by Imakuni