This classic loop turns Viridian Joiner into an absolute powerhouse, leveraging its ability to tap for green mana equal to its power to fuel the engine. By utilizing Staff of Domination's targeted untap ability, you can ready the Joiner while simultaneously untapping the Staff itself for a modest mana investment. Once Viridian Joiner's base power is high enough to generate surplus green mana beyond what the activations cost, this recursive loop yields infinite green mana. From there, you can funnel that endless resource into the remaining activated abilities of Staff of Domination to gain infinite life and draw your entire deck.