Famished Foragers does not have summoning sickness.
You have at least two opponents.
An opponent is unable to block and kill Famished Foragers.
An opponent has lost life this turn.
Steps
Declare Famished Foragers as an attacker.
Famished Foragers' myriad ability triggers, creating at least two token copies of it that are tapped and attacking.
The Famished Foragers tokens enter the battlefield, adding at least six ({R} magic symbol) .
At the end of your combat phase, Blade of Selves triggers, exiling the Famished Foragers tokens.
Move to your postcombat main phase.
Activate Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , causing you to untap all creatures you control and to get an additional combat and main phase after this one.
Repeat.
Once you have a large amount of red mana, if you have a card in hand, you may activate Famished Foragers' ability to rummage infinitely.