Brass Infiniscope, Voltaic Construct, and Mishra, Eminent One

Prerequisites

• Brass Infiniscope on the battlefield
• Voltaic Construct on the battlefield
• Mishra, Eminent One on the battlefield

Steps

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Brass Infiniscope that is a 4/4 artifact creature with haste named Mishra's Warform
2. Activate Mishra's Warform by tapping it, adding and creating a delayed triggered ability
3. Activate Voltaic Construct by paying , untapping Mishra's Warform
4. Repeat steps 2 and 3 as desired
5. Cast the spell with in its mana cost, with being at least 2 if you wish to gain life
6. Each instance of Mishra's Warform's delayed triggered ability triggers, causing you to draw a card and gain half X life, rounded down, for each trigger

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers