Blade of Selves, Heronblade Elite, and Najeela, the Blade-Blossom

Prerequisites

• Blade of Selves on the battlefield
• Heronblade Elite on the battlefield
• Najeela, the Blade-Blossom on the battlefield
• Blade of Selves attached to Heronblade Elite
• You have three opponents
• Najeela and Heronblade Elite do not have summoning sickness
• , plus two additional mana in any two colors available

Steps

1. Declare Najeela and Heronblade Elite as attackers
2. Najeela triggers twice, and Heronblade Elite's myriad ability triggers
3. Resolve Najeela's abilities, creating two 1/1 Warrior creature tokens that are tapped and attacking
4. Resolve Heronblade Elite's myriad ability, creating two token copies of Heronblade Elite that are tapped and attacking
5. The nontoken Heronblade Elite triggers twice, and each token Heronblade Elite triggers once
6. 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
7. Activate Najeela by paying , 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
8. Activate the nontoken Heronblade Elite by tapping it, adding
9. Activate a token Heronblade Elite by tapping it, adding
10. Activate the other token Heronblade Elite by tapping it, adding
11. Activate Najeela by paying , untapping all attacking creatures you control and creating an additional combat phase after this one
12. Repeat from step 7, varying the colors of mana added in steps 8, 9, and 10 as needed to continue the loop

Results

• Infinite colored mana
• Infinite combat phases