Cadira does not have summoning sickness and cannot be blocked by an opponent.
You control at least five tokens.
Steps
Deal combat damage to an opponent using Cadira.
Cadira triggers, creating at least five 1/1 Rabbit creature tokens.
Move to your postcombat main phase.
Activate Phyrexian Altar five times by sacrificing five Rabbits, adding ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) .
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.
If you control six or more tokens when Cadira deals combat damage, this combo nets infinite Rabbit tokens and colored mana.