Each player may sacrifice a creature. Each player who sacrificed a creature this way chooses a Head and taps it. Each player who didn't sacrifice a creature this way loses 3 life.

, : Choose a card name, then reveal the top card of your library. If that card has the chosen name, sacrifice this artifact and draw three cards. Activate only as a sorcery.

Equipped creature has "Whenever you draw a card, this creature gets +1/+1 and gains flying until end of turn" and ": Draw a card."
Whenever a Wizard creature enters, you may attach this Equipment to it.
Equip

Whenever you crank Division Table, target player loses 2 life.

Whenever a creature you control with mana value 5 or greater enters, you may attach this Equipment to it.
Equipped creature gets +4/+4.
Equip

If a spell or ability an opponent controls causes you to discard this card, put it onto the battlefield with two +1/+1 counters on it instead of putting it into your graveyard.

Whenever you crank Dogsnail Engine, target player gains life equal to the greatest power among creatures you control.

, , Exile a creature card from your graveyard: Create a token that's a copy of the exiled card, except it's a 0/0 Construct artifact in addition to its other types and it has "This token gets +1/+1 for each Construct you control." It gains haste until end of turn. Activate only as a sorcery.

Prevent all combat damage that would be dealt to attacking creatures you control.

This land enters tapped.
: Add or .
: Until end of turn, this land becomes an Equipment artifact with equip .
Whenever equipped creature deals combat damage to a player, draw a card.

Combine Doomsday with Doctor Doom to win the game in a single masterstroke.

As this artifact enters, choose a creature type.
, , Sacrifice a creature of the chosen type: This artifact deals 3 damage to any target.

When this creature enters, you gain 2 life and mill two cards.

Whenever you attack, exile target nonland card from your graveyard with two time counters on it. If it doesn't have suspend, it gains suspend.

As this artifact enters, choose a creature type.
Whenever you cast a spell of the chosen type, put a charge counter on this artifact.
Creatures you control of the chosen type get +1/+1 for each charge counter on this artifact.

This artifact enters tapped.
, , Sacrifice this artifact: Target player loses the game.