Najeela, the Blade-Blossom, Mobile Garrison, and Prismatic Geoscope

Prerequisites

• Najeela, the Blade-Blossom on the battlefield
• Mobile Garrison on the battlefield
• Prismatic Geoscope on the battlefield
• Mobile Garrison is a creature
• Mobile Garrison and Prismatic Geoscope do not have summoning sickness
• An opponent cannot block and kill Mobile Garrison
• You control at least one land of each basic land type

Steps

1. Declare Mobile Garrison and Najeela, if able, as attackers
2. Mobile Garrison triggers, as well as Najeela if it was declared an attacker
3. Resolve the Mobile Garrison trigger, untapping Prismatic Geoscope
4. Resolve the Najeela trigger, if applicable, creating a 1/1 Warrior creature token that is tapped and attacking
5. Holding priority, activate Prismatic Geoscope by tapping it, adding
6. Activate Najeela by paying , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one
7. Repeat each combat phase

Results

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