Beyond Netero, Opportunist

Whenever a Warrior attacks, you may have its controller create a 1/1 white Warrior creature token that's tapped and attacking.

{w}{u}{b}{r}{g}: Untap all attacking creatures.
They gain trample, lifelink, and haste until end of turn. After this phase, there is an additional combat phase. Activate this ability only during combat.

This is my challenge to you. The Dark Continent will be the proving grounds.