This clever loop turns the graveyard into a revolving door of endless value, powered by Tortured Existence cycling creature cards back and forth for a mere single black mana at a time. Every time a creature card leaves your graveyard, Insidious Roots spots the departure to weave a fresh 0/1 Plant token while simultaneously growing your entire garden with +1/+1 counters. Thanks to Tuktuk Rubblefort granting haste across your board, those newly spawned Plants don't have to wait to pitch in—they can immediately tap to produce the very black mana needed to fuel Tortured Existence all over again.