Legendary Creature â Human Warrior
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 this ability only during combat.
Matt Stewart INTERVIEW
Untapping an attacking creature doesnâ€™t remove it from combat.
There is no main phase before the additional combat phase. This means that, for example, you canâ€™t activate an equip ability between combats.
The controller of each Warrior token created by Najeela chooses which player or planeswalker itâ€™s attacking. The tokens donâ€™t have to be attacking the same player or planeswalker as the creature that caused the ability to trigger. They can even be attacking players or planeswalkers that werenâ€™t being attacked.
Although the tokens created by Najeelaâ€™s first ability are attacking, they were never declared as attacking creatures (for the purposes of abilities that trigger whenever a creature attacks, for example).