Holding priority, activate Kirol by tapping it and another creature you control, copying Molten Echoes's trigger.
Resolve the copy of Molten Echoes's ability, creating two token copies of Kirol with haste.
Holding priority, activate a Kirol token by tapping both Kirol tokens, copying Molten Echoes's trigger.
Repeat from step 4.
This clever loop centers around the incredible synergy between Kirol, Attentive First-Year and Molten Echoes, which turns a single creature entry into an escalating cascade of token copies. Because Council of Reeds lets you ignore the legend rule and Exalted Sunborn doubles the amount of tokens created whenever you make them, your board state explodes exponentially with every iteration. By tapping your creatures to activate Kirol's ability on the stack, you continuously copy Molten Echoes's entry trigger to pump out endless tapped copies of Kirol, fueling a boundless engine of creature entries and leaves-the-battlefield triggers.