Halana and Alena trigger, putting at least three +1/+1 counters on
Cryptic Trilobite.
Attack with at least
Najeela.
Najeela triggers, creating a 1/1 Warrior creature token that is tapped and attacking.
Activate
Cryptic Trilobite by removing three +1/+1 counters from it, adding ({6} magic symbol) that can only be spent to activate abilities.
Activate
Najeela by paying ({5} magic symbol) , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.
Repeat.
Results
Infinite colored mana that can only be spent to activate abilities.
Infinite colorless mana that can only be spent to activate abilities.
Infinite combat phases.
Infinite creature tokens with haste.
Infinite ETB.
Infinite lifegain.
Infinite lifegain triggers.
Infinite +1/+1 counters on creatures you control.
Metadata
In 1 deck according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).