Cryptolith Rite, Najeela, the Blade-Blossom, and Akroma's Memorial

Prerequisites

• Cryptolith Rite on the battlefield
• Najeela, the Blade-Blossom on the battlefield
• Akroma's Memorial on the battlefield
• You control at least four other creatures that can attack this turn
• An opponent is unable to block and kill your creatures

Steps

1. Declare Najeela and four other creatures as attackers, attacking an opponent that is unable to block or kill them
2. Najeela triggers, creating at least one 1/1 Warrior creature token that is tapped and attacking
3. Holding priority, activate Najeela and the four untapped attacking creatures by tapping them, adding
4. Activate Najeela by paying , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one
5. Repeat

Results

• Infinite colored mana
• Infinite combat phases
• Infinite creature tokens
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers