({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , plus two additional mana in any two colors available.
Steps
Declare
Najeela and
Heronblade Elite as attackers.
Najeela triggers twice, and
Heronblade Elite's myriad ability triggers.
Resolve
Najeela's abilities, creating two 1/1 Warrior creature tokens that are tapped and attacking.
Resolve
Heronblade Elite's myriad ability, creating two token copies of
Heronblade Elite that are tapped and attacking.
The nontoken
Heronblade Elite triggers twice, and each token
Heronblade Elite triggers once.
Resolve all
Heronblade Elite triggers, putting two +1/+1 counters on the nontoken
Heronblade Elite and one +1/+1 counter on each of the token
Heronblade Elites.
Activate
Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures you control, giving them trample, lifelink, and haste until end of turn, and creating an additional combat phase after this one.
Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures you control and creating an additional combat phase after this one.
Repeat from step 7, varying the colors of mana added in steps 8, 9, and 10 as needed to continue the loop.