Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Whenever Spireside Infiltrator becomes tapped, it deals 1 damage to each opponent.

Summary Judgment deals 3 damage to target tapped creature.
Addendum — If you cast this spell during your main phase, it deals 5 damage instead.

Destroy target tapped creature.

Delirium — Thraben Foulbloods gets +1/+1 and has menace as long as there are four or more card types among cards in your graveyard. (A creature with menace can't be blocked except by two or more creatures.)

: Target Human gains double strike until end of turn.

Whenever you cast your first spell each turn, choose an opponent at random. Vial Smasher the Fierce deals damage equal to that spell's converted mana cost to that player or a planeswalker that player controls.
Partner (You can have two commanders if both have partner.)

Flash
When Vizier of Deferment enters the battlefield, you may exile target creature if it attacked or blocked this turn. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Flash
When Whisper Agent enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)