Hyrax Tower Scout + Mana Echoes + Prismite + Saheeli, the Sun's Brilliance

GUR identity

Commander legal

The 4 combo pieces

What must be in place

Saheeli does not have summoning sickness.
{U}{R} available, plus an additional {U}{R} if you control less than three creatures that share a creature type with Hyrax Tower Scout

How to execute it

  1. Activate Saheeli by paying {U}{R} and tapping it, creating a token copy of Hyrax Tower Scout with haste.
  2. When the token Hyrax Tower Scout enters the battlefield, it and Mana Echoes trigger.
  3. Resolve the Hyrax Tower Scout trigger, untapping Saheeli.
  4. Holding priority, if you control less than four creatures that share a creature type with Hyrax Tower Scout, repeat steps 1 through 3 one additional time.
  5. Resolve all Mana Echoes triggers, adding {C} for each creature you control that shares a creature type with Hyrax Tower Scout for each trigger resolved this way.
  6. Activate Prismite twice by paying {4}, adding {U}{R}.
  7. Repeat.

What the combo produces