Preston Garvey, Minuteman | Najeela, the Blade-Blossom

Cards

Preston Garvey and
Najeela on the battlefield.
Enchanted permanents you control can tap to produce at least four mana of different colors.
You control at least one land that does not have a Settlement token attached to it, or enchanted permanents you control can tap to produce at least ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) .
An opponent cannot block and kill Preston.

At the beginning of your combat phase, Preston's first ability triggers, putting a Settlement Aura token onto the battlefield attached to a land you control.
Declare Preston as an attacker, and
Najeela if desired.
If
Najeela was declared as an attacker, it triggers, creating a 1/1 Warrior creature token that's tapped and attacking.
Preston's second ability triggers, untapping each enchanted permanent you control.
Activate any number of enchanted permanents you control by tapping them, adding at least ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Activate
Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.
Repeat each combat phase.