Its just too expensive for how narrow of applications it has in Constructed
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Legal Oathbreaker Legal Penny Not Legal Toolbox Notes and Rules Information for Six-Sided Die: You choose the target creature as you cast Six-Sided Die
Until someone figures out the combo Teething Wurmlet remains a cute little oddity that has to go in Kibo, Uktabi Prince decks
1x Sandshrew 2x Diglett 2x Mankey 1x Machop 1x Geodude 1x Cubone 1x Rhyhorn 1x Mienfoo 1x Clobbopus 1x Graveler 1x Grapploct 1x Pidgey 1x Pidgeotto 1x Rattata 1x Spearow 1x Doduo 2x Pok Ball Nidorina & Nidorino Deck (Genetic Apex) First-Time Rewards: 2x Pack Hourglasses, 50x Shinedust, 1x Shop Ticket Battle Task: Knock out your opponent's Active Pokmon 1 time with an attack from a Fighting-type Pokmon
Second, Leaf Gilder is less reliable than a land because it's easier for your opponent to kill
Its only fitting we get a new massive legendary dragon on Dominaria, and Rith, Liberated Primeval is just that