Najeela, the Blade-Blossom (SLD-1557) - Secret Lair Drop / Eivor, Raven Clan Champion (Borderless)

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.