Brass Infiniscope + Voltaic Construct + Mishra, Eminent One

Brass Infiniscope

Voltaic Construct

Mishra, Eminent One

How it works

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 CC and creating a delayed triggered ability.
3. Activate Voltaic Construct by paying 2, untapping Mishra's Warform.
4. Repeat steps 2 and 3 as desired.
5. Cast the spell with X in its mana cost, with X 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.