This clever loop relies on Tortured Existence to continuously cycle creature cards between your hand and graveyard for a single black mana each time, fueling an engine that scales out of control. Every time a creature card leaves your graveyard, Insidious Roots triggers to spit out a 0/1 Plant creature token while pumping your growing garden with +1/+1 counters. Thanks to the mana-generating ability granted directly by Insidious Roots, that newly hatched Plant taps to pay the exact black mana needed to feed Tortured Existence again. Meanwhile, Frostcliff Siege sits on the board silently providing passive aggression, pumping your creatures with +1/+0, trample, and haste (or drawing you cards if you choose Jeskai), turning your infinite loop into a devastating army.