Emissary Green | Aggravated Assault | Crystalline Crawler

Cards

An opponent is unable to block and kill
Emissary Green You have at least three opponents
Emissary Green does not have summoning sickness.

Declare
Emissary Green as an attacker.
Emissary Green triggers, causing you to create a number of Treasure tokens and put a number of +1/+1 counters on each creature you control.
Move to your postcombat main phase.
If you control a Treasure, activate it by tapping and sacrificing it, adding ({R} magic symbol) .
Repeat step 2 until you control no Treasures and/or have ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) available.
If
Crystalline Crawler has a +1/+1 counter on it and you do not have ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) available, activate it by removing a +1/+1 counter from it, adding ({R} magic symbol) .
Repeat step 5 until you have ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) available.
Activate
Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat.

Near-infinite combat phases.
Near-infinite untap of creatures you control.
Near-infinite mana creatures you control can produce.
Near-infinite +1/+1 counters on creaatures you control except
Crystalline Crawler.