The Incredible Hulk and without summoning sickness).
Easy Prerequisites
An opponent cannot block and kill
The Incredible Hulk.
Steps
At the beginning of your combat phase,
Fire Nation Turret triggers, giving
The Incredible Hulk +2/+0 and firebending 2 until end of turn.
Declare
The Incredible Hulk as an attacker. Its firebending ability triggers, adding ({R} magic symbol) ({R} magic symbol) .
Holding priority, activate
Pyrohemia by paying ({R} magic symbol) , dealing 1 damage to each creature and player.
The Incredible Hulk triggers, putting a +1/+1 counter on it, untapping it and giving you an additional combat phase after this one.
Repeat each combat phase.
Notes
If desired, you can use the remaining ({R} magic symbol) to activate
Pyrohemia more times and stack combat phases. You can also use that mana to put charge counters on
Fire Nation Turret. As you repeat step 1 each time,
The Incredible Hulk will gain another instance of firebending 2, which will trigger separately, adding an additional ({R} magic symbol) ({R} magic symbol) each loop.