Eivor, Raven Clan Champion - Najeela, the Blade-Blossom (Rainbow Foil) (SLD-1557) [Secret Lair Drop Series] Foil

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

WUBRG: 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.