Activate Saheeli by paying and tapping it, creating a token copy of Coercive Recruiter with haste.
When the token Coercive Recruiter enters the battlefield, it and Mana Echoes trigger.
Resolve the Coercive Recruiter trigger, untapping Saheeli.
Holding priority, if you control less than four creatures that share a creature type with Coercive Recruiter, repeat steps 1 through 3 one additional time.
Resolve all Mana Echoes triggers, adding C for each creature you control that shares a creature type with Coercive Recruiter for each trigger resolved this way.
Activate Energy Refractor twice by paying 4, adding .
Repeat.
This ingenious loop turns Saheeli, the Sun's Brilliance into a manufacturing plant for temporary artifact copies of Coercive Recruiter, which immediately trigger themselves to untap Saheeli upon entry. Every time a new Pirate enters the battlefield, Mana Echoes generously rewards your expanding horde by flooding your pool with colorless mana based on your total creature count. To convert that overwhelming colorless output into the exact colors needed to keep the cycle going, Energy Refractor steps in as a handy filter while quietly replacing itself in your hand upon arrival.