By using Nemata, Grove Guardian's ability to pump out token creatures, we set the stage for an explosive chain reaction, amplified dramatically by Ojer Taq, Deepest Foundation's replacement effect tripling the number of tokens entering the battlefield. Those newly minted tokens immediately tap for mana thanks to Insidious Roots granting them the ability to add one mana of any color, fully refunding the activation cost and fueling the loop indefinitely. Meanwhile, having Anger sitting quietly in your graveyard ensures that your massive army of tokens can immediately attack with haste as long as you control a Mountain.