Najeela, the Blade-Blossom, and Faeburrow Elder

Prerequisites

• Najeela, the Blade-Blossom on the battlefield
• Faeburrow Elder on the battlefield
• Najeela and Faeburrow Elder do not have summoning sickness
• You control a blue and a black permanent
• Opponents can not block and kill creatures you control

Steps

1. Declare Najeela and Faeburrow Elder as attackers
2. Najeela triggers, creating a 1/1 Warrior creature token that is tapped and attacking
3. Activate Faeburrow Elder by tapping it, 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 each combat phase

Results

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