Najeela, the Blade-Blossom, Brudiclad, Telchor Engineer, Helm of the Host, and Phyrexian Altar

Prerequisites

• Najeela, the Blade-Blossom on the battlefield
• Brudiclad, Telchor Engineer on the battlefield
• Helm of the Host on the battlefield
• Phyrexian Altar on the battlefield
• Helm of the Host attached to Najeela
• Najeela does not have summoning sickness
• An opponent cannot block and kill enough of your creatures to end the combo

Steps

1. At the beginning of combat, Helm of the Host and Brudiclad trigger
2. Resolve Helm of the Host's trigger, creating a nonlegendary copy of Najeela with haste
3. Resolve Brudiclad's trigger, creating a token, then causing all tokens you control to become copies of the nonlegendary Najeela token with haste
4. Attack with at least three Najeela creatures
5. Each Najeela triggers at least three times each, creating a total of at least nine Warrior tokens that are tapped and attacking
6. Activate Phyrexian Altar at least five times by sacrificing at least five Warrior tokens, adding at least
7. Pay to activate any Najeela, untapping all attacking creatures, giving them trample, lifelink, and haste until end of turn, and creating an additional combat phase after this one
8. Deal combat damage, gaining life equal to the amount of damage dealt
9. Repeat

Results

• Infinite colored mana
• Infinite combat damage
• Infinite combat phases
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite sacrifice triggers