Eccentric Pestfinder // Turn Stones (Secrets of Strixhaven Commander #94)

Creature — Troll Druid - {2}{B}{G}
Trample
At the beginning of each end step, if you gained life this turn, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)
5/5
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Sorcery - {B}{G}
For each opponent, you create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."