Load your deck with bomb cards in many different card types like Displacer Kitten, Silence, Smothering Tithe, and Culling Ritual
Only cost me $15 per card
Of course, the most valuable Charizard ex from this set is the Special Illustration Rare version, which has seen a massive price variance recently, but which will likely set you back somewhere in the region of 75-100
USA buyers importing Japanese cards might notice loose holders
Unless paired with cards that let your creatures deal their combat damage via their toughness such as Huatli, the Suns Heart, Gauntlets of Light, Assault Formation and, more thematically, Treefolk Umbra your Treefolk will be sitting back and absorbing damage in the early game until you find the cards necessary to go on the offensive
this deck will require some forethought to pilot, but should be adaptable to what the deckbuilder wants to get out of it