Byzantium Radiation — At the beginning of your upkeep, put an exposure counter on Aplan Mortarium. Then you lose life equal to the number of exposure counters on it.
Whenever chaos ensues, create two 2/2 black Alien Angel artifact creature tokens with first strike, vigilance, and "Whenever an opponent casts a creature spell, this token isn't a creature until end of turn."

Choose two target creatures controlled by the same opponent. That player chooses one of those creatures. Trial of Agony deals 5 damage to that creature, and the other can't block this turn.

When this creature enters, scry 1.

Whenever a nontoken creature you control dies, this creature deals 1 damage to you and you draw a card.

: Add .
, Sacrifice this land: Search your library for a basic Mountain, Forest, or Plains card, put it onto the battlefield tapped, then shuffle.
Cycling (, Discard this card: Draw a card.)

Up to three target creatures can't block this turn. Goad them. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)

This spell can't be countered.
Reach, vigilance, trample
Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
Choose a Background (You can have a Background as a second commander.)

: This creature gets +2/+2 until end of turn. Activate only once each turn.

Flying
Celebration — At the beginning of your end step, if two or more nonland permanents entered the battlefield under your control this turn, draw a card.

: Add .
, , Sacrifice this artifact: Draw three cards.

This artifact enters with three charge counters on it.
, : Put a charge counter on this artifact.
, , Remove a charge counter from this artifact: Target creature gets +3/+0 until end of turn.

Enchant player
As this Aura enters, choose a card name.
Spells with the chosen name enchanted player casts cost more to cast.
Whenever enchanted player casts a spell with the chosen name, you may sacrifice this Aura. If you do, draw a card.

Necrogoyf's power is equal to the number of creature cards in all graveyards.
At the beginning of each player's upkeep, that player discards a card.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

(: Add .)

Changeling (This card is every creature type.)
When this creature enters, you may return target creature card from your graveyard to your hand.

Whenever an opponent discards a card, this creature gets +2/+2 and gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Target creature gains flying until end of turn.
Draw a card.

As an additional cost to cast this spell, discard a card and sacrifice a creature.
Two target creatures each get -13/-13 until end of turn.

Torrent of Fire deals damage to any target equal to the greatest mana value among permanents you control.

Cards in graveyards can't be the targets of spells or abilities.
, : Exile this artifact and all cards from all graveyards. Draw a card.