Brass Infiniscope | Voltaic Construct | Katsumasa, the Animator (and one other card)

Spell with in Mana Cost

Cards

Spell with ({X} magic symbol) in Mana Cost in hand.
All other permanents on the battlefield (
Brass Infiniscope without summoning sickness ).

There are legal targets for the spell with ({X} magic symbol) in its mana cost, if applicable.
You have enough mana to cast the spell with ({X} magic symbol) in its mana cost reduced by ({C} magic symbol) ({C} magic symbol) , accounting for ({X} magic symbol) to be 2 or greater if you wish to gain life.

Animate
Brass Infiniscope.
Activate
Brass Infiniscope by tapping it, adding ({C} magic symbol) ({C} magic symbol) and creating a delayed triggered ability.
Activate
Voltaic Construct by paying ({2} magic symbol) , untapping
Brass Infiniscope.
Repeat steps 2 and 3 as desired.
Cast the spell with ({X} magic symbol) in its mana cost, with ({X} magic symbol) being at least 2 if you wish to gain life.
Each instance of
Brass Infiniscope's delayed triggered ability triggers, causing you to draw a card and gain half X life, rounded down, for each trigger.

Each activation of
Brass Infiniscope adds a delayed triggered ability that can draw you cards and gain life if you cast a spell with ({X} magic symbol) in its cost. If you wish to use these abilities, you'll want to stop the combo before getting too many triggers such that you'll deck yourself and lose the game. To gain life, you must spend at least ({2} magic symbol) for X when casting the spell.

This combo has been estimated to be Exhibition (Bracket 1+).