Najeela, The Blade-Blossom (EDH / Commander)

Derevi, Empyrial Tactician + Najeela, the Blade-Blossom

Result: Infinite combat steps. Infinite tokens.

Requires: Najeela, Derevi, and an additional Warrior or two non-Warrior creatures on the battlefield. Up to 5 permanents on the battlefield that in total produce {w}{u}{b}{r}{g}.

Steps:
Attack with Najeela, Derevi, and enough creatures to create 5 Derevi untap triggers.
Once combat damage is dealt, untap enough permanents to produce {w}{u}{b}{r}{g}.
At the end of combat (still in combat but after damage is dealt), activate Najeela for extra combat steps.
Repeat to create more Warrior tokens with each combat step to overrun your opponents.

Najeela, the Blade-Blossom + Nature's Will

Result: Infinite combat steps. Infinite creature tokens.

Requires: All permanents on the battlefield. You control at least one creature that can deal unblocked combat damage to an opponent. You control lands capable of tapping for at least {w}{u}{b}{R}{g}.

Steps:
Attack with your creature.
On combat damage, Nature's Will triggers, tapping all lands the player you damaged controls and untapping your lands.
Activate Najeela for {w}{u}{b}{R}{g}, untapping your attacking creatures, giving them trample, lifelink, and haste, and adding an additional combat phase after this one.
Repeat.

Bear Umbra + Najeela, the Blade-Blossom

Result: Infinite damage. Infinite lifegain. Infinite combat steps. Infinite ETB triggers. Infinite creature tokens.

Requires: All permanents on the battlefield. Najeela, The Blade-Blossom without summoning sickness. Bear Umbra enchanting Najeela, The Blade-Blossom. Lands capable of producing {w}{u}{b}{r}{g}.

Steps:
Move to combat, declaring Najeela, The Blade-Blossom as an attacker.
When Najeela, The Blade-Blossom attacks, untap all lands you control with Sword of Feast and Famine.
At end of combat, pay {w}{u}{b}{r}{g} to activate Najeela, The Blade-Blossom's ability and gain an additional combat step.
Repeat.

Faeburrow Elder + Najeela, the Blade-Blossom

Result: Infinite combat steps.

Requires: Najeela on the battle field. Elder on the battlefield. One or more permanents that have at least {u} and {b} in their casting cost.

Steps:
Declare attackers with Najeela and Faeburrow Elder.
Tap Faeburrow for {w}{u}{b}{r}{g} to pay for Najeela's ability and untap Najeela and Faeburrow Elder.
Repeat until you destroy your opponents through damage via infinite combat steps

Najeela, the Blade-Blossom + Sword of Feast and Famine

Result: Infinite damage. Infinite lifegain. Infinite combat steps. Infinite ETB triggers. Infinite creature tokens.

Requires: All permanents on the battlefield. Najeela, The Blade-Blossom without summoning sickness. Sword of Feast and Famine equipped to Najeela, The Blade-Blossom. Lands capable of producing {w}{u}{b}{r}{g}.

Steps:
Move to combat, declaring Najeela, The Blade-Blossom as an attacker.
When Najeela, The Blade-Blossom deals combat damage to a player, untap all lands you control with Sword of Feast and Famine.
At end of combat, pay {w}{u}{b}{r}{g} to activate Najeela, The Blade-Blossom's ability and gain an additional combat step.
Repeat.