Najeela, the Blade-Blossom | Atsushi, the Blazing Sky | Rionya, Fire Dancer

Cards

At the beginning of combat on your turn,
Rionya triggers, creating at least two copies of
Atsushi with haste.
Put all token copies of
Atsushi you into your graveyard due to the legend rule.
Each
Atsushi token that died this way triggers, creating at least six Treasure tokens.
Declare
Najeela as an attacker.
Najeela triggers, creating a 1/1 Warrior creature token that is tapped and attacking.
Activate five of the Treasure tokens by tapping and sacrificing them, adding ({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 getting an additional combat phase after this one.
Repeat.