Whenever a Warrior attacks, you may have its controller create a 1/1 white Warrior creature token that's tapped and attacking.
: Untap all attacking creatures. They gain trample, lifelink, and haste until end of turn. After this phase, there is an additional combat phase. Activate only during combat.
Najeela deploys Warriors, swings wide, and uses combat to snowball: each attacker spawns more tokens, and her five-color ability buys infinite combat phases once you have the mana to chain them. You win by going extremely tall/wide in a single turn or by generating infinite combats with a mana engine. Early turns build Warrior bodies and ramp; the kill turn loops attacks until everyone is dead.
Steals blockers/threats and turns them into attackers under Najeela's trigger.
Tighten the manabase with original duals, fetches, and fast mana (Mana Crypt, Sol Ring, Mana Vault) so you can land Najeela early and activate reliably. Add efficient tutors (Demonic Tutor, Vampiric Tutor, Worldly Tutor, Finale of Devastation) to assemble the Repository/Cryptolith Rite combo, and run protection like Heroic Intervention and Silence to shield your kill turn. Trim slow Warrior fillers for interaction and ramp to push toward a high-power/cEDH build.