As this artifact enters, choose a creature type.
Each creature card in your graveyard has the chosen creature type in addition to its other types.

Equipped creature gets +3/+3 and has first strike.
Equip

Whenever a creature deals damage to you, destroy it.

Starting & Max Hand Size: +1
Starting Life: -8

Sacrifice a creature: Add .

You may choose not to untap this artifact during your untap step.
, : Target creature you control gets +2/-2 for as long as this artifact remains tapped.

, Sacrifice Ashnod's Coupon: Target player gets you target drink.
Errata: You pay any costs for the drink.

, : Target player looks at the top three cards of their library, puts one of them back on top of their library, then exiles the rest.

Whenever this creature attacks, exile target card from a graveyard.
Unearth

, Sacrifice this artifact: Put a +1/+1 counter on target nonartifact creature. That creature becomes an artifact in addition to its other types.

Skemfar Elderhall enters tapped.
: Add .
, , Sacrifice Skemfar Elderhall: Up to one target creature you don't control gets -2/-2 until end of turn. Create two 1/1 green Elf Warrior creature tokens. Activate only as a sorcery.

Magecraft — Whenever you cast or copy an instant or sorcery spell, put a book counter on Spell Satchel.
, Remove a book counter from Spell Satchel: Add .
, , Remove two book counters from Spell Satchel: Draw a card.

Equipped creature gets +2/+2, has haste, can't attack you or planeswalkers you control, and can't be sacrificed.
At the beginning of each opponent's upkeep, you may have that player gain control of equipped creature until end of turn. If you do, untap it.
Equip

Hidden Agenda (Start the game with this conspiracy face down in the command zone and secretly name a card. You may turn this conspiracy up at any time and reveal the chosen name.)
Creatures you control with the chosen name have "When this creature dies, you may pay . If you do, create a tapped 2/2 black Zombie creature token."

, : Reveal a creature card in your hand. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.

: Target Assembly-Worker creature gets +1/+1 until end of turn.

No more than one creature can attack each combat.
No more than one creature can block each combat.

Whenever chaos ensues, Astral Arena deals 2 damage to each creature.

, , Sacrifice this artifact: Add two mana of any one color. Draw a card at the beginning of the next turn's upkeep.

Hybrid animal mayhem

: Add or .
: This artifact becomes a 4/4 red and green Dragon artifact creature with flying until end of turn.

Indestructible
When The One Ring enters, if you cast it, you gain protection from everything until your next turn.
At the beginning of your upkeep, you lose 1 life for each burden counter on The One Ring.
, : Put a burden counter on The One Ring, then draw a card for each burden counter on The One Ring.

As Thran Portal enters, choose a basic land type.
Thran Portal is the chosen type in addition to its other types.
Mana abilities of Thran Portal cost an additional 1 life to activate.