During your upkeep, you're forced to tap an untapped creature you control or destroy the card
This unexpected popularity makes OP-08 a great case study in how price and accessibility impact collector behavior when choosing between Japanese and English releases
Consider the Urza's Saga mechanic echo
Other takes on this strategy have centered on Brain in a Jar, which has the disadvantage that it can be slow to get going late, but its advantage, in addition to not being an enchantment, is that it has an interesting combination with Days Undoing that allows you to cast Days Undoing on your opponents turn, skipping the end the turn clause, which means that the Days Undoing ends up in your graveyard
Its a deck that made me fall in love with Pauper, and Ive always enjoyed making it work in other formats, especially Legacy
This illustration by Yoriyuki Ikegami is a treat, with so much detail in all the little plants and woodlands around Bulbasaur, it's no surprise that this basic-level Pokemon is so highly valued